Metal Slug 6 (Atomiswave): Internal refresh rate changing on second and succeeding launches

[Rally10]

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Platform / OS / Hardware:
Retroarch - Arch Linux
Flycast version:
v2.7-15-g8f511f8 libretro
Hardware:
x64
Vulkan driver
Description of the Issue

Launching the core with this game first, it reports 59.95hz, closing it and opening again shows it at 59.83hz.
The game will show 59.83hz each time is run again until retroarch is closed.

Debugging Steps Tested

• Start retroarch
• Run any flycast core game
• Menu -> Close content
• Run mslug6

Logs Gathered

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Screenshots