Hi,
For some reason, when I turn symmetry on (on a completely symmetrical object which is not rotated and is in the middle of the world) and I try to paint a mask, using lazy mouse for example, some of the strokes don’t get copied/mirrored to the other side… how come !? I noticed it happens if I zoom in to mask 
Also, is there a way to mirror a mask to the other side?
Thank you !