RBR 853 firmware 3.2.17.12_1.4.14 has issues

The issue seems related to the UpNP feature of the router.

When I esablish the PPOE connection (reboot of router and/or ADSL brtidge) it worked fine for a while.
I searched in the Orbi logs and noticed that briefly before it stops functioning ...there is the trace:

[UPnP set event: AddPortMapping] from source 192.168.x.x, Monday, Mar 08,2021 11:04:08

This seems to come from a Foscam camera.
Strangely, if I look at the UPnP Protmap table on the Orbi, there is no trace of anything.

I suspect that the UPnP port mapping request of the Foscam camera is leading to a "corruption" of port mappings on the basis of which the router becomes deficient in handling my manua "port forward" rules as well.

This is imho a serious security issue as a single device can lead to a disfunctioning of the router.

If confirmed It is either a problem related to the firmware (as I didn't notice issues before), either a corrupte PortMap table after the firmware upgrade process (which could be resolved by doing a factory reset but I am not eager to do this as it can lead to problems).

From now on,
- I disabled UPnP on the Foscam camera (which wasn't an easy task as the process to go to their admin console is cumbersome)

- I disabled UPnP on the router as well

If the issue is disappearing I may consider reactivating the latter