Window turns off since update

Since the last update for my UM4.6 when I change frame rate the windowed setting turns off. Only just noticed because I've been using primes but have gone back to B4 mount for a series of ENG type shoots. They are mostly 25fps but there are a few bits we need to shoot in 50fps and whenever I change the frame rate I'm back to full frame. Its not a big deal just an unnecessary dive into the menu every time.

And now it's not doing it.