Object with vertex color only still reported with 2 bitmaps in the profiler

Hi Guys!

I have some models where the last LOD is just a simple object with vertex color, nevertheless in the statistic profiler the object is reported as too many bitmaps (2). The object has a standard material but there are no bitmaps assigned.

Why?

Shall I disable the material and only use vertex color? But than I cannot adjust the roughness and metallic setting


Thanks a lot!