I also run Custom idle animations, but I don't come across this issue. Maybe you could try going through and disabling all your add-ons except custom idle animations to see if it's a custom idle animations issue or another addon that's causing it?

If it's another addon, your best bet would probably be to go through all your addons and disable a bunch of them at a time to see which one fixes the issue. That way you can report the bug to the add-on developer. If it's a Custom Idle Animations error, you could try deleting the addon and its settings then reinstalling it.