Anyone on PC experiencing not only input LAG but input ignores?

@Balladalidila

YOur game might be running in borderless even when you set it in game to fullscreen which comes with 10-20fps less and noticeable input lag.

You can know your game isnt true fullscreen if you ALT+TAB from game and its instant without black screen for second or two.

Here is fix (copy paste from Reddit) Im using, note that only disabling FC optimizations might not help, you need to edit Windows registry as well:

Run regedit and copy: \HKEY_CURRENT_USER\System\GameConfigStore\Children\

Ctrl+F search r5apex.exe

"Flags" change to "211"

In Windows:
r5apex.exe→ right click → properties → compatibiliy→Change settings for all users →Disable fullscreen optimizations→OK→OK

Restart PC.

Hope it helps, helped me.