I’m using a Sony A7 R2 for my source. I’ve unwrapped and then textured. As you can see in the screenshot the source images have color, but for some reason appear as grayscale when texturing. I can’t seem to find a setting that fixes/affects this.
What are your texturing settings?
Try to reset texturing settings and try again. You can do it Reconstruction Tab > Model Color&Texture section >Settings
I tried both and got the same result. I seemed to have a bug with the colorize as well (it was green). I changed the colorize settings, re-ran colorize (which fixed the bug), then re-ran texture and it resolved itself somehow.