I verified that the patch from issue 38006 is in 4.14.0-release, but it didn’t fix the issue! It works if you cherry-pick that patch into 4.13.2, but not in 4.14.0 itself.
I created a new AnswerHub issue for it here: Valid Development Provision and Certificate ignored for tvOS [Workaround] - Platform & Builds - Epic Developer Community Forums