@Alexey Just saw this reply. What we have is a continuous spinning wheel when connecting to a mobile device user. As you installed the jot server and Igor migrated it to our new server, our guess is it should be working correctly. This week we did a new installation of Jitsi on a new server and the same issues exist as noted above. And, these issues do not exist when use Jitsi outside Messenger. We have touched the Jot Server configuration other than this week pointing to the new domain. As far as message delivery, it is being delivered in real-time. As our Jitsi is working as intended without performance issues outside of Messenger, where would you suggest we look to discover the configuration compatibility issue?