Hive Fortress map cannot be completed

Hi,

I finished the 20 waves (and died before being able to get out so maybe that's the origin of the problem) and got the loot out of the tower but I still have the objective "kill all rare monsters" and the map is still in progress on the atlas.
The problem is that with the hive arms blocking my path, I cannot get that objective done.
I've seen videos of players completing the map with the "kill all rare" objective still not done so that may not be the problem but, in any case, that is still unfortunate.
Have a nice day.

New development:
It turns out dying in any map in the breach hive region makes it impossible to complete.
I've had 2 more maps like this where I die at the boss after doing the breach hive and the map objective "complete all breach hive" resets and the map is completely empty on respawn (except the boss).