@tmm1 All Primes have been updated and each DVR instance has been rebooted. Each DVR can see all 3 Primes but they are only attempting to access the first priority. There are no issues with channels or sources being disabled to cause this.
The exception to this is that a local device will access another tuner if priority 1 is full. For example, three local devices are accessing all tuners of priority 1 Prime and I attempt to start a remote stream, it will fail even if the other two Primes are free. If a fourth local devices tries to start a channel it will grab a tuner from one of the unused primes. (I think it may also limit local devices that are transcoding to the first priority as well but I need to test this further)
I'm not seeing any errors in the log other than what was previously reported.
Also, is it strictly as issue with first priority and not the Primes, if I change the priority order it will correctly use priority #1 no matter which Prime that is, but will only use that single Prime for remote streams.