Freezing when masking

THE PLATFORM: iPad, Android, Windows, MacOS, etc
NOMAD APP VERSION: 212.1

when using the mask tool, it’s no longer showing the extract preview and then it’s freezing. I’ve restarted the app and turned off my iPad on and off and it’s still producing the same freezing effect.

Send the mesh, if I don’t have the nom file to replicate I can’t do anything.