This bug still exists. I am on android and game is 100% latest.
So if you summon pet near 8th/9th floor exit or directly on floor exit it will cause next wave skip.
Also you will lose all gold items taken before. When you try to sell you will get an error "Item does not exist"
After game restart quantity of gold items will be decreased. For example I tried to sell gold items for 800k, got the error, restarted client and after restart only 600k left. 200k disappeared