Recently noticed with Beast Attack & Spiders HE in Stronghold, some foe leaves combat mode or gets stuck in/ under the surface.
(at least once it happened because spider/ wolf long jump charged companion and possibly missed)
This makes them invulnerable and not targetable, effectively breaking the HE.
Sometimes you can be lucky by moving out of HE area and getting back that the foe recovers and continue the HE.
But sometimes even this doesn't help, foes walk around or are stuck without being reachable.
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