When fighting Arboreel in the Old Capital Ruins it will leave the surrounding area to ambush the player with its flamethrower attack. However it occasionally doesn't come back from this attack causing the player to be softlocked in the encounter (unless they use the I'm stuck in the menu) as the arboreel is needed for all enemies to be defeated.
Steps to Reproduce
Fight Arboreel notice how it disappears forever in a level and you can't progress.
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.