Sorry. For keep poking u about the issue.
But it seems you are the only one who kept hitting on the issue.
I am going to try out your manual way of sigining ipa . Before trying it out one question,were you able to submit your ipa to appstore using that method?
I think I’m the only one who cares about deploying to tvOS, is what it is.
No, I have never been able to submit a tvOS .ipa to the app store, no matter what. The current bugs have a ticket marked as expected to be fixed in 4.16. Which is the same process I went through with the earlier bugs in 4.15.
Before all this I would have thought a globally broken build process for an entire platform would have merited a hotfix. 
6 years later and the don’t give a shhit about it. ■■■ em (middle finger)