Both my Toshi 1612's stopped reading subchannel-96

I have Toshiba SD-M1612’s in my home (revA) and office (revB) machines, and I’ve used both to read subchannel 96 (CD+G) reliably using Fantom CD. Suddenly, neither will read it. :confused: My LiteOn burners will still read subchannel in both machines. I’m trying to retrace my steps, but I really haven’t done that much on either machine. Has anyone else had this happen?