Volume escalates to full !. :-O .. A bit dangerous?

Roon Core Machine

Roon 2.0 (build1311) production (64 bit)
Running on NUCi5. Window 10.
Wired 1Gb Ethernet. Client is Pi3 PoPieee, latest version.

Networking Gear & Setup Details

Connected Audio Devices

Number of Tracks in Library

Description of Issue

Escalating volume.
Something playing on one zone OK.
I choose transfer to another zone.
Volume escalates from where it was (maybe 10%)… and I watch on phone/tablet as it escalated slowly to 100%…
I can interfere to lower volume but it just keeps going when I stop.
As you can imagine… THIS IS A BIT SERIOUS!
Speakers OK so far but I am worried.

This happened with an an AudioPro C10 (airplay) as main target,
And then I redirected it to a Roon Bridge (pi3 RoPiEEE) and it carried on escalating (more dangerous as that is a quad 405-2 amp and BW speakers).

Has anyone else experienced this?
What can I do to make things safe(r)?

3 posts were merged into an existing topic: Roon interface volume plus and minus buttons (+/-) sometimes get stuck [Ticket In]