Hi Michał,
I have found a temporary workaround. It's not pretty, but it works.
It is in the attached project file. 
Basically this is what the changes are:
- It tracks timestamps that talk button, monoon and monooff events occur
- If those occur within 30ms (defined in constant) of each other then the failure is deemed to have occured
- In this case it starts a Timer that 800ms (defined in constant) later will re-open the line (less than 750ms would not work)
Let me know if this workaround helps.
In the meantime I will raise the issue to our software team and also re-test on Spokes 3.0.
Thanks,
Lewis.
Message was edited by: Lewis Collins