481 call does not exist

We are experiencing a common, yet problematic, SIP dialog flow between our Freeswitch (v1.10.10) and the Zoom SBC, which frequently results in hanging calls. We are seeking insights into why Freeswitch fails to terminate the session properly on the first attempt. The Problematic Call Flow...

greetings to all, By chance someone has solved the problem of 481 Call Does Not Exist. It's a new facility, calls come in and out fine, only when the originator calls and the recipient ends the call first, the originator stays active, it doesn't receive BYE signaling. This is a Grandstream...