Not sure if anyone will see this since this community isn’t active, but I refuse to post on reddit.
It’s an ugly solution, yet so far the only one I’ve found that consistently works: Get a USB extension cord and plug the bolt receiver into that. Then place the receiver close to your keyboard.
When I initially got the keyboard and it was having the stuttering issues, I gave the bluetooth option a try. It ended up giving me serious input delays, so I switched back to the bolt which was at least usable.
Since I had just gotten a newly released 7950X, I figured it might be a BIOS issue, but subsequent BIOS updates never solved it.