Bug when using shaders? Prboom /doom

Hi all, I think I’ve encountered a possible bug when using the prboom /doom core.

If I choose a shader and hit apply, everything looks fine. However, if I save these settings, exit RA, start RA and then load the config, I get weird, uneven scaling, like some of the video settings have been altered.

Can anyone else replicate this? Any advice?

edit:

solved when a system crash caused me to need to reinstall everything.