trenchanter Official Solus DEs, except Kde, use Stable repo by default. If you didn't switch to Unstable or add a third-party repo by hand, then the packages used during upgrade arrive from Stable. "Main branch" is undefined.
Not only snaps are fixed now. Tor browser finally works as it should as well. No black magic, voodoo dances, disabling - (re)enabling AppArmor profiles are needed anymore to use Tor normally.
Good job.