I am having some of the same issues with attachments. Some not attaching when I tell them to, and also some not being taken off when I try to take them off. The only solution is to relog and then it seems to have been fixed. I have noticed it specifically so far with mesh and non mesh items, so I don't know.
I am using Firestorm. I really have never had a single issue with it before. I had done a clean install of it up to 4.4.1 then they had the "emergency" thing and I reinstalled 4.4.2, without doing a clean install. They said I didn't need to since I had just done one. But my issues started after the update. All that to say, yeah, I have no idea but hopefully it is short lived!