Hi all. In May, '22, I ordered and installed a Hwy 407 transponder on the passenger side of center, under clear glass. It doesn't beep when I exit the highway(s). I've been billed for camera charges and emailed 407. They credited me several camera fees, but it's still happening. They say it may be because some cars have heated glass, radio antennas, etc in the glass. I think the transponder is faulty. Anyone else had any problems with one in a C8? Hank