I can't tell then... I think this is beyond my computer knowledge

maybe it happens due to the engine I used to make the game. I'll investigate it.
Ill look into it too. Might be something i can find out on my end, potentially something funky with AMD or framerates/refreshrates.
My experience with AMD is their hardware is "brutally honest" it doesnt guess or make half measures, it just directly does whats its told.
An example, something as simple as not telling and how often to refresh the UI can cause it to be refreshed as often as it can.
The engine you use is "unique", in the sense that I have not seen it used before.
If others have the same issue, be nice for them to say and share their specs.
Unsure but this might assist you on your end: