Eldthurs stuck behind stone deposit as it tries to attack my base

It seems like Eldthurst can get stuck when trying to attack my base, due to an unfortunate placement of a stone deposit on the same tile as the Gate of Muspell. The Eldthurst gets stuck after it's sent to attack my base by the "Invasion from Muspell" event, slowly dying by itself.

1 - This is happening on Conquest, playing as clan of the bear. I'm on the Muspell's Wrath mission.
2 - Windows
3 - DirectX
4 - This is probably seed specific. I have played Muspell's Wrath before without this happening, but it seems to happen to every Eldthurst that got spawned after I expanded a certain distance
5 - Video updloaded to https://youtu.be/3uFonctxrZs
6 - Map Size Medium, seed 592770360 (visible in screenshot and video)
7- I can't see anywhere to upload a bug report on this page? I have the save file backed up if you want it.

yiptmihyt4lnqzzvzc88.png