On the map Celestial Pools after using Strange Siren a group of immortals who were at a waypoint are now stuck at that waypoint and haven’t moved for hours. You can see the symptom because their status is Not Moving, but Strange Siren (“must move towards caster”) is also in effect. They are not under any other effects like Chaos Web.
I saw this same problem in an earlier instance of Celestial Pools with a group of Immortal Hydra at Location 166. That was (not) resolved by sending units there to attack. Now seeing this problem the second time on the map instance above I wanted to report it.