I've got an EFJ5100 in UHF with firmware v4.14.5, and I'm having trouble scanning the output frequencies of a trunking system in conventional mode.

For the channels in question:
NAC is set to the correct NAC for the site I'm scanning
"Digital Squelch" is enabled
Talkgroup is set to 65535

If I simply park the radio on one of the trunked frequencies it will umute correctly when traffic occurs on that channel; it just won't scan them.

I can successfully scan a mix of P25 and analog conventional channels using a scanlist in another zone that is otherwise identical, except for the channels that are assigned to it.

Am I doing something wrong, or is there something different about P25 channels (from an ASTRO 25 7.x system) that this radio doesn't like?