I am also having this problem, with an added annoyance.
I have auto-target on and auto-select new target when the old one dies turned on.
Both were working, about 20 hours ago, I logged off, then an hour later I logged back in and both had stopped working.
Now it won't look for a new target for me, and it constantly says there are no targets available, even when someone is directly in front of me and within firing range.
Thanks to this issue, I have gone from spending the whole time hunting people down and having a blast. To spending more than half the match spinning around in circles wondering where the hell everyone is, then randomly dying.
