Spider Woods didn't complete with 0 monsters remaining

Cleared out the entire T12 Spider Woods map and it said 0 monsters remaining in the top right but didn't count as completed and didn't allow me to continue progressing past it. The zone didn't have any special encounters (breach, ritual, delirium, etc...). Waited around for a few minutes for the indicators to show up but they never did. I redid the zone afterwards and it was possible to complete it like normal after reopening it with a different waystone. Not sure what the cause was.

Bloodwood did not generate rares in this map making it impossible to complete, Tier 12 map as well. Stuck at 0 monsters left.

Same happened to me, T1 Spider Woods. I don't remember fighting any rares so that might have been why, but not 100% sure. The map had +% rare monsters to boot.

Feedback: Getting literally zero should never be a possibility in the first place. It's bad enough the game has maps with no bosses. No rares... Surely you jest!