1. Probably for any ship with AA (encountered on Chung Mu): after reconnecting to the battle I was unable to switch AA support side; I don't remember if I had AA disabled before losing connection
2. Load into the battle -> disconnect with the server (by losing connection to the internet) -> reconnect with the server and load to the battle
3. Upon reconnecting and trying to swich AA side, the "wheel" is grey irrelevant of AA being on or off, with a 0.0 timer in the middle. It doesn't react upon clicking any of the sides of it (reinforcing the other side of the ship or cancelling the reinforcement on the one currently chosen). It is basically frozen for the rest of the game.
4. The "wheel" should be green or grey depending on AA being on or off respectively and react to player interaction, i.e. "clicking" on any of it's halves and reinforcing or cancelling the AA reinforcement. Inside of the wheel should be a destroyer icon (instead of 0.0 timer)
5. No idea on technical things, but I'll attach the screenshot. AA was on at the moment of taking the screenshot (sorry for polish UI).
*I'll also add that due to infrequency of connection loss (my internet provider s... ekhem, is not very reliable) I did not try to forcefully trigger the bug after it appeared for the first time.