Fullscreen exclusive buggy games

Sometimes randomly I find some Unreal games with serious issues with Fullscreen mode exclusive.
The problem is that these games even when you save & exit in gfx options Fullscreen (and not Windowed, or Borderless) they usually start in Borderless mode and you have to enter video settings every time and switch them back to fullscreen borderless, confirm, and then go back to fullscreen (exclusive) to see real fullscreen exclusive actually applied.

A pair of these affected games are:

So… as a simple player and not UE dev, is there a way to “force” them to launch in real fullscreen exclusive mode through .ini files or command line option?

GameUserSettings.ini
usually already has correct setting:

FullscreenMode=0

but this seems to be ignored on first launch and you have to switch between another screen mode (e.g. borderless) and then back to fullscreen exclusive every time, to properly set the fullscreen mode as written above…

Thank you in advance for helpful comments.


Windows 10 21H1 (19043.1023), NVidia 462.59, 1920x1080 G-Sync 144Hz screen