I didn't. Had to chase an ET run tonight. Is the Wizard is FFA though?
Here's the official chart:
I don't know what's the status of the mob in question, is it MVP or normal?
That's said, I have a lot to say in regarding AFK leveling, but personally speaking if they are indeed doing as described by Foxier then that will cause inconvenience to users interested in finishing the daily.
I'll bring this issue to Campitor myself, the fixed spawn that is. But do send in a ticket with detail of the incident and how it is affecting your quest/daily. Replay video/screenshots will be needed.