According to the article, these are the issues.
https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/2...
https://bugs.launchpad.net/ubuntu/+source/glib2.0/+bug/20632...
It looks like snap related. I wonder when Canonical give up on snap. Is this a NIH syndrome? They reinvented the wheel(package manager) and failed miserably.
Debian has dpkg/apt and the upgrade process has long history of smoothly done. Now they add another half-baked package manager that need to be tended carefully. Extra software is extra burden of maintenance.
