Complete reset after entering map

Twice in the past few minutes, I've entered a map, leveled, done map completion, then been booted. Both times character reset to the state before entering the map. i've lost the map, exp gained, map complete, and all loot.

That is not a bug on its own, it happens when the server your instance was on crashes.
You get rolled back and your map portals are gone cos the data is lost on the server side.
They fix server crashes and sometimes new ones appear.