Bug Crash on summoning mount

Since quite some time a crash is happening when summoning a mount. No crash message, no anything. Game simply quits to client. Today I crashed like that in Sewers under the Crypt of Kings. After I started the game again, it placed me in town (Kingshill). I wasn't very angry, because I had killed most of the enemies and one leader monster (and there were no bosses in the map). I entered the map again, paying 18 keys again, and it placed me on the same map I was before! Then I was actually angry. I'm writing this right after clearing that map.

 

if you crash in a map and get kicked to the city you can go back and get drops or resume from where you were. if map completed and want a new one need to switch maps to somewhere else first to reset your original map. This changed a while ago when many people were taking advantage of a bug to continuously do boss maps prior to that you would return to original map for free

 

I can confirm this. It often happens when I'm doing 5vs5 duels.
At the beginning of the fight if i double click on the summon mount button the game crashes without any warning or error message.
Once I relog I'm outside the map with the 15 min ban.