The stuff I added did not have the QKs enabled in the per channel/dept options settings. No QKs means no scanning.
Once I enabled them it worked perfectly.
This is the issue in these situations. You may
think you have it enabled, but that's not necessarily the case. For some reason, either the scanner or Sentinel is "shutting off" quick keys that are not in use, either when you power up the scanner, or when it is read into Sentinel from the SD card. Either way, you have quick keys that are disabled, and you don't know it; when you put something in a "new" quick key, it remains disabled, even though you can see it in the scanner. This happened to me twice before I got it sorted out. Now, every time I write to the scanner, I triple-check that my desired quick keys are enabled.
I know you guys above are saying this isn't true, that you had them enabled, but read the radio into Sentinel, then go check which quick keys are enabled. I think you'll be surprised.