I've found the flag bearer role has had some new bugs added to it recently which I'm not entirely sure how to duplicate.

At times when I try to pick up a flag I crash and so do other players from what I can see. The other day I went to pick up a flag, I crashed. I came back and I saw the flag role was available so I selected it. When the timer got to 0 I crashed. I reloaded the game and tried again and the same thing happened.

Today I went to pick up a flag and I crashed instantly.

Also I've noticed that instead of spawning as a generic "color bearer - private" when I select the flag bearer (but the role is actually not available) I just won't ever spawn.