Yep, been happening to me repeatedly now that I'm leveling up again on PC. It's pretty ridiculous, think it happens at least once every other day? I finally hit CP again but not looking forward to go…
I reported this in bug reports forum weeks ago and haven't gotten any response. I did read someone in another topic say zos is aware of this and is working on it.
Just had this happen to me today as well. Very frustrating. The queue for DPS is long enough as it is. Sucks big time when you finally queue and you can't actually do the dungeon.