Since using the latest Blender build (2.9) I have been having some weird geometry artifacts:
sometimes the vertices are gone/disabled and while I still can delete/select the faces any other oction will not properly work.
If I connect other faces to this “broken” mesh they will inherit this problem as well. Does anyone know what is going on ?
EDIT if I re-import as an .obj the mesh works fine. Strange isn’t it ?