Hello!

Seeing how you said that in Fcheck, the Maya-rendered frames seemed ok, and that the issue was noticed after DF rendered it, you might wanna check a DF-specific site for help on that as I would have no idea what might be casuing that.

For good Digital Fusion, and general pro compositing advice, try VFXtalk:

https://www.vfxtalk.com/

If they tell you that it is something with Maya, I would let them know that you checked your frames with Fcheck, and they were fine.

Might have something to do with the "sampling"? ...maybe... not sure...

Sorry I couldn't be of more help.