Comment # 9 on bug 1160068 from Bryan Gartner

(In reply to Stephan Kulow from comment #8)
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833477 suggested 
> -disable-features=EnableCastDiscovery - which does the trick.

Thanks Stephan ... confirming that startup arg does provide a viable workaround