Data Management - IGNORE like mapping being treated as a member

We have a bunch of Multi Dimensional mappings for the Account dimension. We want to IGNORE any member that was not part of the previous mappings.

When we do a * to IGNORE Like mapping, we recently started getting an error 3303. It is looking for a member called "IGNORE" but cannot find it, so the integration is erroring out.

Does anyone know what could be causing this glitch?

I feel like I've come across this before, but can't quite remember, nor could I find anything on the forums on this.