Well I caved and ordered a Roku Streaming Stick+ for use exclusively with Criterion at the suggestion of folks on the Criterion Forum and Reddit who are also bothered by the issue on ATV 4K. I'll update here if anyone is of the same mind as me on the issue (just buying a cheap fix while Criterion and Apple get their s**t together) if it works out for my purposes.
LG OLED55B7A | Apple TV 4K | Sony UBP-X700
Pioneer Sx-750 | TEC TC-7220 | Kenwood VR 507 | ADS 500 Acoustic Suspension Speakers
Denon DL-110 | Technics SL-1700