The short version of this issue.
-The cargo transfer button will sometimes be unusable while Docked on own carrier.
Relogging does "fix" temporarily.
It doesn't happen all the time, but just enough to be annoying.
I'm on ps4.
Yes I know this is just an inconvenience type bug that may live on forevermore.
If you could consider adding to the issue tracker report or not, either way, Thankyou.