I have the exact same issues!! Two days ago I stated getting problems 1 & 2 on server "A". It appeared after I randomly crashed whilst driving around, after that I started getting black screens even trying to connect. Switched over to server B. At server B I was playing a few hours flawlessly yesterday until I suddenly crashed and got the same old black screens when trying to reconnect. I tried various things but what actually removed the black screens was deleting the contents from the "Arma 3" and "Arma 3 - other profiles" in the documents folder. Now I can connect to server A and B but I get random freezes at various locations so it's unplayable. It should be noted that I can play on other servers with different mods (eg. EUTW servers) without any problems!
