Not sure what updates you are expecting to happen.

I'm not aware of any effort trying to identify the traffic going in and out on Thunderbird under android. The guesses from the one reporting about what happens when configuring a new email account is of no use since it's easily associated to Thunderbird looking for ways to easy automation on new accounts settings.

Unless there's a throughout analysis of the traffic, I'm not aware of anything to be expected. You can try reaching the one reporting his concern, and ask if he has looked into how to report an actual issue/bug to Thunderbird, or if someone else has done it