Stucked on Vivern Taxi

Hi, I got a problem with my fresh Death Knight Feldamn.
Today I decided to fly on taxi from Akerus to Bastion in Tirisfal Glades. I take a fly, and it satrt to fly straight through textures across Eastern Kingdoms. When it reach the edge of map, it drops me into a water. I tried to do smth, but its like im on mout all the time, cant use anything, even "unstuck" button.
I tried to relog. it didnt help.
Thien i decided to go to zeppelin to Nordscol. On my foot I reach Tirisfal glades, take a zeppelin, and successfully moved to Howling Fjord.
But when I loaded in Fjord, i was on vivern taxi again, and it stars to drive me throug all textures across Fjord.
I tried to relog again - didnt help. Tried to delete Cache folder - the same.

Some of last screens of my bugged taxi:
https://i.ibb.co/pXDJ00c/Wo-WScrn-Sh...022-235806.jpg
https://i.ibb.co/Qc6swSt/Wo-WScrn-Sh...022-235943.jpg

Fortunately, vivern flies around the nord sea for half an hour, and then died (with me)
All good, i resurrected in Barrens.

But I dont recommend to use Flight master in Akerus

For future cases, you can use "Character unstuck" service here: https://www.warmane.com/account/services

Oh, thanks a lot. Didn't find it by my own.