Found another bad review for ContextCapture when comparing to other software packages. Seems again bad results are related to curved model issue.
Something should be done about it either show a message that there seems to be issue with flight if it is set as Nadir but cameras are not in one plane or some cosmological constant used which would straighten it up for novice users otherwise this is very typical issue for starters.
Dataset 70m Nadir, Sony A6000, no pose metadata
Article: Accuracy Assessment of a UAV Block by Different Software Packages, Processing Schemes and Validation Strategies
P.S. Just found out that this paper may not be accurate representation now as it is using 2016 year versions of software for comparision even that done in year 2020.