Unable to communicate between Android and Computer

[Bzzzz]

Debian buster + deb-multimedia
Jami Version  : jami-all  20200430.1.b9c48ee~dfsg1-1  amd64 (uPnP enbled)
ADSL Provider : sfr (box nb6, uPnP enabled)
Phone         : Huawei Y6 2019 (MRD-LX1)
D2R2          : Android 9 (Pie)
Line provider : free mobile (fr)
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Hi listers,

With the former Debian package (it changed yesterday), I had a least :
* audio : bi-dir
* vidéo : only from Computer (C) to Android (A)

With the new one, nothing except messaging
well, hardly : Rx when a msg is Tx with the other part offline
then turned on afterwards (whatever the part is and from a fresh
restart), but it only works A→C after that first shot :(

Also, not any call succeed, whether it is A→C or C→A (video and/or
audio), it always times out.

Does anybody have the same issues and/or advice, such as which ports to
forward to my computer instead of relying upon uPnP ?

Jean-Yves