Bridge Star Rating is not working in Lightroom after import

I processed Raw images in Adobe Bridge on a local drive during a trip  and gave the star rating and edited in Camera Raw. At home, I imported the images in Lightroom Classic from the same folder to a NAS. The raw edits were all applied correctly. However, the ratings are not displayed. The XMP rating is not visible. I looked at the XMP files in the Lightroom directory with Text Edit, there is clearly the rating as xmp:Rating="1" with e.g. 1 star listed. I then copied the xmp files from the local directory again into the Lightroom directory, without success. So is there any idea how to solve this problem? Thanks for your help!