Increasing audio delay

[MiniMike DK]

I am having a problem, especially on Floatplane, with the audio slowly loosing its sync with the video.

It starts fine, but after about 3-4 min it becomes noticeable and at 7 min its like watching a dubbed movie.

Audio syncs up again when I pause and play again, but the sync issue restarts.

One thing I have noticed is that Windows says my refresh rate is 143Hz, and my monitor says 144Hz. Don't know if it could have something to do with the problem.

Any ideas?

 

My system:

I7 7700K @4,5Ghz

Asus Prime Z-270-P

Asus GTX 1070 Strix

16Gb ram - 3200Mhz

M.2 NVME 250Gb

AOC 2560x1080 @144hz

 

 

[MiniMike DK]

Forgot to add that the problem doesn't appear on Youtube, or in streaming services like Netflix and Viaplay.

Is Floatplane using a different format than Youtube??