Finished map, server kick, lost items.

I was running a T7 map on the Sealed Vault map in a mountain biome with a friend. We completed the map successfully and picked up the final loot of some rares and an Atalui's Bloodletting then portaled out. After clicking the portal we were both kicked from the game and given an error message saying that "user does not own instance". We logged back in and were in our personal hideouts and all the items we had just picked up in the map were gone. They were replaced with random low level currencies, socketable runes a skill gem and a normal rarity talisman. Provided the best I can remember, the one gem is the only memorable loot piece. Will update if it occurs again.

Also found that it reset some of my map. It shows I failed that map but it reverted the connecting maps. As the map looks i shouldve never been able to access that node.