[jitsi-dev] Invite with Replaces

I hope that this time someone can help me.
I'm trying to add some missed features in Android jitsi, like mergeCall,
transfer etc. But i have a problem with the replace invite, that seems not
well supported in jitsi.

In Android when i receive an invite with replace there are a
mono-directional packets to the Android device, but not vice versa.
The same thing appears if the Android device puts on hold the current call
and create a new call, the last call have the same mono-directional packets.

Someone have an hint?