TC Disable no longer works on SDL after ECU upgrade to 3.5

I had an alarm that read "TC off" on my SDL via M800 Error Group 4. I use a bitmask of 01.
It worked flawlessly for a year. After updating to 3.5, the channel cycles between 1 and 0 constantly irrespective of what the switch is doing. I have confirmed it is working in the M800 software. Any ideas?
Regards,
-Neel
It worked flawlessly for a year. After updating to 3.5, the channel cycles between 1 and 0 constantly irrespective of what the switch is doing. I have confirmed it is working in the M800 software. Any ideas?
Regards,
-Neel