Ready for bug squashing?
anyways, yes, there seem to be no colliders on the docking port. Also, I've experienced problems with the RCS for the ranger, lander and viper. It doesn't look like the Endurance itself has a problem, but you can check just in case. The RCS thrust seems to fire out of nowhere (Not aligned with RCS ports), and I can't use them correctly to do rendezvous and dock with the Endurance. This is all of the problems I've encountered so far.