Hello,
Please watch the videos. Is there a problem here? I always have these problems with masked files.
Ekran_Kaydı_2021-01-04_22_29_54.mov
Ekran_Kaydı_2021-01-04_22_23_56.mov
After removing the layers inside a group with mask one by one, on the last layer removed, the mask will punch through other layers. Sometimes undoing back will also produce weird mask but generally it make the mask work again. Also happen on the beta version.
MaskBug.mov
MaskBug.afdesign