I just wanted to report in that this bug is still in the game. It doesn't occur a lot, but when it does, it makes Boba Fett really hard to play.
I've done a search on how many reports I could find about the bug, and there were two others in languages that I could read:
English one from December last year: https://answers.ea.com/t5/Bug-Reports/Boba-Fett-Jetpack-Failure/m-p/6506145#M2643
German one from last week: https://answers.ea.com/t5/Bugmeldungen/Boba-Fetts-Jetpack-funktioniert-oftmals-nicht/m-p/7123318/highlight/false#M1414
The bug has been mentioned a few times by YouTubers, but has never gotten real attention (including on reddit and on EA Answers).
Basically, the bug has been quite unnoticed and therefore this update that the bug is life and well... still in the game. I've recorded footage of me trying to fly with Boba in HvV, but was unable to do so (while having enough fuel). After respawning, it worked properly again. It is quite hard to test the bug since it doesn't seem to happen often.
Hopefully, some of these hero bugs will get some attention and be solved in an upcoming update.