rooms sometimes never sync up with gchat

[ahs3]

That's a very simplistic description, unfortunately.

What I see happening is that I will start up Element and connect it to a gchat bridge. If there has been no traffic in a given gchat channel for a while (I have not been able to quantify how long "a while" is yet -- anywhere from 24 hours to a week, so far), Element will take an extremely long time to bring the channel up to date and display any discussions at all, sometimes in the range of several hours; I have one channel where I've given up waiting for the bridge to sync up after a day or so.

It appears the bridge is just stuck. However, you can "unstick" it by posting a new thread in the gchat channel. The new thread shows up in Element and things seem to start moving again.