Tanaka said:
Isn't it a bug that when you individually add a pilot to a group it takes weeks for them to arrive but when you add groups of pilots to a group it is instant? Aren't they supposed to work the same?
I pointed out that was incorrect, including running a test, the result of which demonstrates that it is incorrect.
You have added a different issue to the discussion - experience.
but the point is that I can use the "release pilots" button to secure no delay for any of the pilots and ensure no XP loss
On delays, see above. I tested it already ^^^^. I got delays on 17 out of 46 pilots. 2/3rd no-delay is hardly a "vast majority". So, no you can't secure it. It's not "sometimes", either, it's frequent and regular IME. It is not a mere quibble.
If the experience* loss thing is broken, I doubt it's going to make the "to do" list given Erik's comments above.
[* I always sort and select pilots by primary skill, and take little notice of experience, TBF.]