Well I think for your own sanity now just accept she is going to continue to do this ... maybe it will prompt you to make a move out of her home sooner?

I know this is annoying the hell out of you but in the big scheme of things ??? This is just a tiny bit of time

Maybe she’s really struggling with her own identity , your grown now, maybe she feels kinda of lost , like ok my daughter has grown up , what do I do now????

Instead of focusing on how annoying she is maybe have a conversation about how she feels ? Is she sleeping well? Maybe this is a hormonal deal , not sure of ages but many women deal with menopausal stuff younger and younger.

So you have nothing to lose by letting the focus be on her for a while. You don’t know what she might be struggling with, so hey ! put your mom first in conversations.

Just a thought