So everytime I think I have my Smartnet Recorder working with GnuRadio 3.7, I find another bug. This time it had to do with having the control channel to the far edge of the sample range. The control channel was around 854.86MHz, the center was at 858MHz and the sample rate was 8Msps. This put the control channel at the edge of sample but still in range. It worked for a bit, but it would not consistently receive trunking messages. Switch the center to 856MHz fixed it!
Anyhow…. now it will definitely work with 3.7! For Sure!