No issues so far with the RJM GT MM.
IIRC (please correct me if I'm wrong) in the RJM you have to import all presets/scenes from the III in bulk. ( )
In other words: the preset- and scene names are not loaded from the III on a program/scene change but are loaded from the internal memory of the RJM. So then it makes sense that the RJM will not have these issues.
You probably will have the same issues with the new beta firmware if you import them again.
Loading them directly from the III on a preset/scene change, like the MC-10 does, has the benefit that your data is always correct and not out of date.