Naming convention for Ignore Backface suffix in bake settings

In Substance Painter, when baking, you can append suffixes like _low and _high to the mesh names to make them match. However, when I set up the rule for Ignore Backface Suffix (in this case, I used _igno), it seems to be applied to the _low and _high naming convention as well, which results in an error. Am I doing something wrong here, or is this a bug?

The version I’m using is 11.0.3.