Comp Window goes "Blank" after Save or Auto-Save

Hello there,

Since yesterday, AE CC 12.1.0.168, everytime I save or it auto-saves the main comp window just goes blank. Zooming in and out of the magnificiation sometimes displays my work but this is unworkable as most of the time it shows it at 1.5%. The way to get this back is to purge all memory.

I have a fairly beefy PC with 32gb with a Quadro 4000 graphics and as I said I have never experienced this before yesterday.

Any ideas?

Thanks

Tuhin