After every processing the orthofoto fails. It seems that different plots within the ortho mix up.
I have it both with RGB and MS. I ve tried different projects, each time same problem. Processing runs well till the latest second of processing, i see the ortho build upo, then in the latest second the ortomosaic foto mix up. See example
This looks like a GPU incompatibility.
Could you turn GPU acceleration off? Please import images again and disable it on the Processing options. https://support.pix4d.com/hc/en-us/articles/360028421272-Processing-options-PIX4Dfields#GPU
After processing, please update your Graphic card drivers.
Thanks for the answer. Problem solved.