ET in 4k despite windows scaling at 200%?

Hi, im using a 65" LG oled TV to play ET, but if I play it in 4k by adding:

+r_mode "-1" +r_customwidth "3840" +r_customheight "2160" +cg_fov "115" +set com_hunkmegs "768" +vid_restart

to the target in the ET-sortcut-proprieties, the game keeps messing up the resolution, unless i put windows scaling at 100%.

Changing this back and forth from 100% to 200% each time I play ET is really annoying. Is there some known fix for this?