App broken after update to v2.6

[glad-dev]

After upgrading from v2.5 to v2.6, my self hosted Wger instance stopped working on mobile. The website works fine, including pagination, but the app states that the server is misconfigured and headers are missing.
From the Nginx logs, I think that the issue might be related to PowerSync instead of missing headers, since its requests are being redirected to an error_doc URL with a 404. The powersync service is reachable via https://wger.example.com/ps/.

I use Apache as a reverse proxy infront of Nginx but use the default docker compose otherwise.

Apache config:

ProxyAddHeaders On
ProxyPreserveHost On

RequestHeader set X-Forwarded-Proto "https"
RequestHeader set X-Forwarded-Port "443"
RequestHeader set X-Forwarded-Ssl "on"

ProxyPass / http://localhost:8085/
ProxyPassReverse / http://localhost:8085/

The nginx logs:

{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.017,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"POST","request_uri":"/allauth/app/v1/tokens/refresh","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":1522,"duration":0.161,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/routine/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.069,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/routine/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.111,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/user-trophy/?limit=999&trophy__is_hidden=false","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":931,"duration":0.130,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/powersync-token","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":543,"duration":0.126,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:00:22+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/trophy/?limit=999","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":3049,"duration":0.132,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/trophy/progress/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":3821,"duration":0.151,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.154,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.019,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/min-app-version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.019,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/min-app-version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.018,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:00:23+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/error_docs/forbidden.html","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":404,"size":2895,"duration":0.020,"user_agent":"powersync-dart-core/2.3.0 Dart/3.12.2 android","referer":""}
{"ts":"2026-07-16T10:00:24+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.019,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:00:28+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/error_docs/forbidden.html","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":404,"size":2895,"duration":0.024,"user_agent":"powersync-dart-core/2.3.0 Dart/3.12.2 android","referer":""}
{"ts":"2026-07-16T10:00:38+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/error_docs/forbidden.html","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":404,"size":2895,"duration":0.022,"user_agent":"powersync-dart-core/2.3.0 Dart/3.12.2 android","referer":""}
{"ts":"2026-07-16T10:02:24+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.018,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"POST","request_uri":"/allauth/app/v1/auth/login","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":1763,"duration":0.862,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/min-app-version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":7,"duration":0.017,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/exercise/?limit=1","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":412,"duration":0.083,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/exerciseimage/?limit=1","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":790,"duration":0.079,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.061,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/user-trophy/?limit=999&trophy__is_hidden=false","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":931,"duration":0.072,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/trophy/progress/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":3821,"duration":0.077,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/powersync-token","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":543,"duration":0.103,"user_agent":"Dart/3.12 (dart:io)","referer":""}
{"ts":"2026-07-16T10:02:25+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/api/v2/trophy/?limit=999","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":3049,"duration":0.125,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:26+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/error_docs/forbidden.html","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":404,"size":2895,"duration":0.024,"user_agent":"powersync-dart-core/2.3.0 Dart/3.12.2 android","referer":""}
{"ts":"2026-07-16T10:02:28+00:00","client_ip":"172.23.0.1","request_method":"HEAD","request_uri":"/api/v2/version/","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":200,"size":0,"duration":0.018,"user_agent":"wger App/2.0.1 (de.wger.flutter; build: 220; platform: android) - https://github.com/wger-project","referer":""}
{"ts":"2026-07-16T10:02:31+00:00","client_ip":"172.23.0.1","request_method":"GET","request_uri":"/error_docs/forbidden.html","request_proto":"HTTP/1.1","request_host":"wger.example.com","status":404,"size":2895,"duration":0.020,"user_agent":"powersync-dart-core/2.3.0 Dart/3.12.2 android","referer":""}

The app's sync status:

App logs:

INFO: 2026-07-16 12:00:43.672376 [PowerSync] Starting Rust sync iteration
WARNING: 2026-07-16 12:00:43.717066 [PowerSync] Sync error: Sync service error