**System Information**
Operating system: win10
Graphics card: 1050ti
**Blender Version**
Broken: (3.0.0 24c16f54571f)
**Short description of error**
Both Box and Elipse masks aren't properly centered or scaled, so with 1.0 width & height factor they don't reach left & lower screen bounds.
**Exact steps for others to reproduce the error**
# set output resolution to 512*512 px
# plug Box Mask to Composite output
# set Box Mask at 1.0 width & height
# render image and check left/lower bounds of the output image -> see black gaps