This bug is reported as fixed in LUNA 2.0.2.
We're aware of an issue with 4K G and LUNA whereby the AU version of 4K G gets inserted instead of the VST3 version (even though it looks like you're inserting a VST3 version from the LUNA plug-in insert browser).
This results in 4K G instances showing up on UC1 and in the Plug-in Mixer at the end, with none of the usual DAW integration (no name, track colour, not respecting the track order of the LUNA session etc).
We have made UA aware of this issue and hope they are able to address it soon.