Thank you for the replies. I did post when the problem first revealed itself that my system that was playing gapless without fail was no longer doing so (went 100% to 0%) and received no replies. I did not think I changed any settings, but perhaps accidentally. Trying to solve the problem, I did make changes to mirror the settings as closely as possible recommended by my Digital Audio Player (DAC built in) manufacturer, Cary Audio (DMS-500). I used an alternative (Roon) on the same computer, router, etc. and gapless works. In the meantime, MC24 came out and I installed it on a newer computer that has access to my NAS drive and it plays gapless fine and just required a few easy tweaks to the default settings. I would prefer to run JRiver from the older computer (now also upgraded to MC 24) because I have a lot of music stored locally that I would rather not transfer at this time. Clearly, there is an issue that is related to the local computer and would appear to a JRiver setting even though I have set everything I could find to gapless. I am using DLNA. New computer is on a KVM switch on the same router and peripherals. Sound quality is not issue, just the gapless playback.
I appreciate any help. Thanks