Audio recording keeps turning itself back on

[IcaNcyou_596163611529276]

HI,
I have 4 RLC-842A on Firmware v3.1.0.989_22051917.
When I disable Audio recording next time I check it has re-enabled itself. This is very frustrating and a legal issue as it is illegal to record somebody without their permission where I live.

I have tried resetting after turning it off and it is still off after power-up. I have no idea how long it takes to re-enable.
They are on the latest firmware.

Any Ideas as I am about to take them apart and physically disconnect the microphone.