Resolve- Premiere Pro Green Screen roundtripping issue

HI,

I'm working on a project using resolve to grade and key out the green screen, but when I export this to put back into premiere pro (and I've tried both the 'Premiere .XML' and 'avid .AAF' presets), the green screen comes up un-keyed, and the shots and backgrounds themselves are also all jumbled up size-wise.

I can adjust my workflow to finish the project in resolve, but was wondering why this format doesn't work? Are Adobe and Black Magic so incompatible that roundtripping should only be used for say colour grading?

Any advice would be greatly appreciated ☺