After running Thunderbird 17.0.11ESR along with sogo-connector and integrator 31.0.6 for a very long time (which was working fine), we upgraded to thunderbird-60.8.0 along with the sogo-connector and integrator plugins version 60.0.2. Unfortunately, in this combination our mail tags are not displayed anymore. The behaviour is exactly the same as described in bug report 0002594, e.g. create a new tag name and tag some mail with it, and after restarting thunderbird the new tag name and the tag on the mail is gone again. Applying the workaround as described in 0002594 which is disabling the synchronizeFromServer function works fine here, but IMHO is only a temporary solution.

I'm guessing 0002594 has been fixed some time ago, because on our customers boxes we are mostly running TB 52.9.1 along with sogo-connector & integrator version 31.0.6 and we never had problems with the mailtags there. But with TB 60.8.0 and sogo-60.0.2 the problem is back again.

Oh yeah, we tried with the nightly build Version 60.0.2-975154fddc-sogo-demo.xpi too, no change. (Yes we edited extensions.rdf :) )