I may have stumbled upon a small bug, or is it?

In a Capture One database, I have two photos with the same name, one a raw file (with its xmp file), one a jpeg export of the same file. 

When I have ingested the C1 database into Peakto, both the raw and the jpeg wre labelled with 2 stars.

Later I added a start to the jpeg file in C1, so now the raw file has 2 star and the jpeg has 3 stars. However, I cannot bring Peakto to show 3 stars for the jpeg (I tried both "Synchronize" and "Smart re-ingest"), it remains with 2 stars.