Hello Robert,
This is a known issue and it happens when the camera model is set to rolling shutter and the resolution of the DSM and orthmosaic os not “1x”.
There is no solution for now.
Are you using rolling shutter? In case so, I would try to not use it. Even if you use a rolling shutter camera, the effect does not always appear so the recommendation is using the standard camera model by default.
This community post contains a lot of information on how to use it.
Thank you very much.