Today I discovered a glitch involving every hero and (not really sure with this point) NPC Sim in my kingdom: Sims in the area around the throne room couldn't leave this area, and the others couldn't get there.
They were showing that waving animation as if sth was blocking their way. Unfortunately, I saved the game, as I had the Quest on platinum and hoped the glitch would vanish if I close and open the game.
I cancelled the quest and started a new one, hoping it would help, but it didn't: my bard Sim couldn't get near my monarch Sim.
I read about other people having this glitch after deleting something in buy mode. Although I hadn't deleted anything, but I remembered having been moving a Sim with moveObjects, I opened buy mode and placed a chair in the castle.
It worked. My bard Sim could talk to my King.
Now I want to ask whether some of you have expierienced this glitch, how it happened and how you dealed with the problem.

SorryForBadEnglish

It sounds like a Sim somewhere in the shell got stuck, either by an interaction with an object not ending properly or simply a routing issue. Another solution could have been shift-clicking the Sim in question and using force reset on them (requires testingcheats enabled). If it was a hero Sim, you could have manually moved them in buy mode as well. However, that would require you to know which Sim that was stuck and that they were still clickable.

Force Reset and moveObjects didn't work. But I'm trying to find out if placing an Object in Buy Mode always fixes this error.