I created a mask in blender, but it moves around when I zoom in and out. For different zoom levels, the mask appears in a different location. Is this a bug in blender? Or is there some way to prevent this behavior?
Arch Linux x86_64, NVIDIA GeForce GTX 560 Ti
Also reproducible on OS X 10.11, NVIDIA GeForce GT 750M
Blender Version 2.78c
Minimal working example
Minimal working movie clip: GOPR1630.mov
On my machine, zooming out will cause the mask to move from its original position. Without the referenced GOPR1630.mov, unselecting and then selecting "Display Stabilization" in the movie clip editor will fix the problem. However, if the GOPR1630.mov file exists, zooming will cause the mask to move whenever "Display Stabilization" is selected.
The amount of mask movement when zooming seems proportional to how much the track point for image stabilization (Track.002) moves.