Hi Have got the same issue.... if i upgrade my Sync-Members to 1.3.109, then some devices are missing. i cannot reach them anymore. back to 1.2.67 i can see them all again and they are syncing again. i do use this sync via Company-Firewall and pure LAN and Internet. so: some people are within the company behind a better firewall, some are at home connected to internet and some are connected via LAN directly (more than one subnet). the problem is already there with the internet connected (behind NAT/UPNP) and also the company user from outside. seems there is a new type of firewall handler, that is more worse
