Maps Closing Unexpectedly When Leaving to Empty Inventory/Identify

Just as the title says, this has happened a few times now, but when I have exited a map to go back to hideout to identify/empty inventory, in the middle of putting stuff in stash, the portal in my hideout collapsed unexpectedly cutting me off from the map (and has robbed me of some serious juiced T16 boss maps).

I'm also never outside of the map for more than a minute tops if I get something decent.

Was the instance timeout inadvertently affected in the patch?