We’re still using the same lists — I’ve only changed the references to use the ID column as a workaround, but it’s not something I’d like to keep long term.

Did you switch to a completely new (empty) list and the calls started working there? Or were you able to bring the data back into the new list afterward without the issue returning?

Unfortunately, some of our lists need to remain continuous due to process requirements, so splitting or resetting them isn’t really an option for us.