Fix Inverted Mask Feather with CUDA Acceleration
If you have CUDA acceleration enabled and apply an Inverted Mask with Feathering, the feathering will appear in the wrong place. Enabling Software Only mode renders the scene correctly.
John Pooley commented
That doesn't have anything to do with this issue. The mask shows up in the wrong place entirely, it is translated upward.
Mitch Wood commented
Go to sequence settings and deselect Composite in Linear Color. GPU acceleration uses linear color by default. Software only mode does not. This is the likely cause of the difference you're seeing.