Pressing V makes UI disappear

[tawdry remnant]

honestly I havent seen the issue before but I would google it first to see if anyone else has noticed it with a certain mod then if that fails backup saves and start ripping things out

hopefully someone else who has seen it may be able to chime in. The R/KSP discord is also far far more active in general for KSp1 and has a modding help channel. That might increase your odds of finding someone knowledgable

the invite code is "kerbal"

I think you get automodded for posting the url