Some Live TV Channels Not Working

Have a Windows 10 machine using Kodi 17.3 with NextPVR as the PVR. Have a Ceton quad tuner for the HD TV. Everything is working really well except that a few channels do not work in Live TV mode. I can record from these channels and playback is flawless when watching these recordings. These channels come in fine when using the NextPVR either directly or through the localhost browser interface.

Anyone know a fix for the few channels not playing live in Kodi?