Kerbal Space Program

Already covered by Bug #18471.

Note, we have found that if you grab the airlock with the claw, then left click once on the hatch of the inflatable docking port and you will have the option to EVA or Transfer the kerbal inside. Use this to transfer him/her into another part then release the docking port. Note, you should shut down any drilling operations as this creates an unstable movement that makes the menu close quickly when you open it.

I have tried that as well, but forgot to mention it. If you load this save and look at the ssto 10t plane, you will see that in both the astronaut complex and tracking station he is listed in this craft. But upon flying the vessel he is not on the UI, and the inflatable airlock has no crew related options.

As also addressed in the other bug report, when you switch vehicles, you lose the portrait so you can't use it for EVA, but if you click on the part, then a menu will pop up allowing you to transfer him into another part. This will cause the portrait to appear for that part so you can EVA if you want. Note that you have to grab the part because someone already reported that the EVA option here does not work, so you have to transfer the Kerbonaut into another part.

Best to follow up with any other difficulties with this bug using Bug #18471 so we're not tracking two conversations.

Yeah, you are right. But I would have never figured out, that you need to left click, and not right click for the context menu. I can confirm, that only transfer works in this case. When I tried to EVA without capture the game said, that the hatch is obstructed.