Sometimes when I'm wounded, I have no radio calls or inventory. Nothing works. Is that normal or it's a some bug?

In order to do not make a new thread I also want to ask when will be fixed C4 bug(If you drive some vehicle and then throw C4 the first one and sometimes even the second one is auto stuck at the vehicle you're drove). It is a very known bug and happens almost every time. The same happens if I plant some sandbag and then I try to throw C4 - it is glued to it.

Another C4 bug - I'm trying to destroy enemy tower, throwing a few C4 and waiting for a while, but when I'm trying to detonate them, they are not working. Nothing happens - can't pick them back by deactivate them.

Another bug for reporting: sometimes artillery shells falling in the wrong place, not where you've targeted and this often causes team killing.

Not normal. I haven't seen this happen as wounded but I've been unable to access inventory, map and radio sometimes in online. Currently no ideas how to make it happen.

I don't see how this is a bug. C4 sticks on things.

EDIT: Just realized you meant that you've already exited and moved away from the vehicle locally when you see the C4 stick on the vehicle after throwing it. That's likely happening because you're off-syncing. On the server, you're still sitting in the vehicle or positioned near it. The bug would be at why the forced OOS sync didn't happen earlier already.

Maybe this is related to the countermeasure that was added to prevent people from spreading C4 near the radio tower, use one to destroy it, camp there and wait for another tower to spawn, destroy it with another C4. You aren't doing that sort of thing, are you?

Artillery strikes are not very accurate, the rounds drop all over the place. Also, the bigger the strike, the bigger the spread for larger area of effect. Mortar strikes are better for hitting specific targets, artillery strikes are more meant for clearing entire bases.