NPC stuck endlessly trying to unlock an impossible door.

[SciCat]

In the Silvanus' Grove, Makeshift Prison, door next to the imprisoned Sazza.
I sent Astarion to try and unlock the impossible door via the right click contextual menu and now he's stuck trying to endlessly open the locked door.
Instructions both sent to him and the MC don't stop this behaviour,
I'm getting a "Can't reach" prompt when I try to move or otherwise give direct commands.

Trying to dislodge the character with Thunderwave didn't work, even though the save was failed.

Otherwise no terchnical issues noted.

Couldn't find this anywhere else, of course easily remedied by reloading to an earlier save.

[SciCat]

Reloading a save after the issue has occurred doesn't solve the issue, the character is still stuck.

[Littlejoejoe]

Not sure if this will help, but that gate is not meant to be opend from this side.
If you face the chasm, there 's a platform to your right where you can jump. If you keep following the platform you will be directed to the underpassage and the warehouse, however if you check there's some vines below you that leads you to another walkway, which you can use to get inside the cell. The pass was covered with explosive mushrooms so be careful, and I haven't found anything useful in that cell either.
There was one curious thing tho, when you are in the cell facing the chasm, you can see a musical note far below you on the cliff. Not sure what that does or if it has any intention at all