The stable update has not happend yet because of the following issue:
In a nutshell: on systems without a battery powered clock (like the pi2,pi3,dragonboard) the apparmor parser can get confused about the cache and load a stale cache. Because we have new profiles in 2.34 this leads to failures at runtime (apparmor DENIALS) because the new profiles are not used but instead the (outdated) cached profiles from the previous core.