I also had the same issue.
I use the following parameter and now i don't have any problems:
--pre-assemble
--primary-seam-generator=nearest-feature-transform --> Don't use GraphCut Algo
--blend-colorspace=identity --> Preventing color pixel in dark areas
I also had the same issue.
I use the following parameter and now i don't have any problems:
--pre-assemble seam-generator= nearest- feature- transform --> Don't use GraphCut Algo colorspace= identity --> Preventing color pixel in dark areas
--primary-
--blend-
Best Regards