Some COLR Color Palettes are not visible

I have a font file with 21 Color Palettes. If I copy and paste the CP into a text editor, all the palettes are there and Glyphs will also export the indexed Instances correctly. However the dialogue window for editing only shows 18 Color Palettes. I have also attached a sample Glyphs file.

BUG.zip (2.4 KB)