Complit DTM and 3D but no Orthophoto

i renderd one part of my project and i am trying understand what goes wrong.
The DMT and 3D model looks good but the Orthophoto lose half of my fly area:

i am trying to understand what parameters i should tweek.
can be wrong --split and --split-overlap ?
the missing part of orthophoto looks very similar to the one that appeared.

Try increasing --min-num-features (double the default).