Yes. Same thing happened to me today. This morning I could deploy them fine, this afternoon I can't even scroll to them or my ammo packs or mines (whichever I equip in slot 4). Slots 4 & 5 are inaccessible.
Yeah I hate these bugs happens the same way with the jetpack and can completely render the classes useless the only solution is to logout and log back in
Interesting. I thought I must be doing something wrong when they stopped working for me. Comforting to know it is a bug, but just me being a noob.