Description of problem:
The flatpak version of Thunderbird on registry.fedoraproject.org is far behind the version in the usual rpm repos.
Version-Release number of selected component (if applicable):
Fedora remote Thunderbird - 91.3.0
Fedora stable repo & Flathub Thunderbird - 91.8.0
Always: the issue is observed each time.
Steps to Reproduce:
1. Install Thunderbird with flatpak install fedora org.mozilla.Thunderbird
2. Open Thunderbird and check version
Thunderbird version is 91.3.0
Thunderbird version should be the same as in rpm repo: 91.8.0
Seems to be closely related to 2036163, which is about the Firefox flatpak having a similar problem.