Multiple issues in IOD between 11.3.3 and 12.0
Between 11.3.3 and 12.0 they are multiple issues in IOD. These issues are mainly regressions in both performance and use of the default data context. More details here: https://forum.orekit.org/t/some-issues-with-iod-architecture-in-orekit-12-0/2860?u=bcazabonne
I think it is important to fix these issues before releasing 12.0 because they compromise the use of IOD for users using their own data context (usuall in case of operational systems such a Flight Dynamics Systems).