I completed it around a month ago. It is definately broken. I lost the WQ for about 10-15 min i think, while I flew out of the zone. reloaded UI, logged out and in. hearthed, asked people in zone if anyone else had a problem (got no answers at all) and in general stressed. Then ... I don't know after more than 15 min the WQ came back, I still had my progress (I was over 30 fish in) and I caught the last few, Hearthed to BB and turned in the quest, got title, got reward all was good...
I say it is still very much broken. I worked for me in the end, but the middle part was pretty stressful.