I gave 303 a spin.. it feels rockstable.
When ALT-ENTER'ing, I can even see MadVR OSD state Windowed > Exclusive > Windowed > etc. Its properly doing as it should be. There is no cutoff of the image now and its resized properly now each time. including subs. Great work !!
X works like a charm as well. No issue found...
Do you want logs of it?
Personally I'd say: Let the regression testing start with this build by the public. Its 95% safe from my POV