Body Paint I can't use projection painting


Hello girls,
True is I don’t use Body Paint often and I have not many experiences with its features. I am working on a project containing low poly character model with an unwrapped UV map in Body Paint and I trying to use Bruh tool for painting directly on the model in Projection Painting mode. When I enable Projection Painting in the left bottom corner of the C4D app a progress bar appears with the text “Processing object for Projection Paint”. It doesn’t take a second and the whole processing starts again and again. Processing just cycles roughly every half second and I can’t paint. Any advice?
(W10 64, R21, GTX 970, i7-5820K, 32GB, texture 2048x2048 six layers in color channel + reflectance channel)
Thank you.