I think Blender is bugging on my side. I have a bunch of vertex groups on a mesh, and everytime I want to delete one, it deletes everything that isn’t locked. Note, I’m only pressing the “-” symbol, not the “Delete all unlocked groups”.
Which means I can’t now delete any vertex group, instead I need to remove it all influence, otherwise it will delete everything.
Has anyone experienced this bug before? And is there a way to solve it besides starting a new file?
That happened to me once. I didn’t figure it out. I just locked all groups then unlocked the one I wanted to delete. It stopped happening after a while, dunno what I did.
That’s also one way of doing it. But it’s so strange.
Well, it bugs sometimes. This is not the only one I’ve encountered 
And it’s complex enough that it’s hard to tell whether something is a bug or a feature in the first place.
Had this problem again, paid more attention to it. Resolved on quitting and restarting Blender.