Thanks, Jim. There are multiple issues dealing with easing keyframes from Edit that are out there, some of them long-standing.
I think what I'm seeing is new in beta 6, but has a similar effect, in the end, to some of the issues that people have had with trying to ease both Scale and Position at the same time. Those issues might arguably be due to the interaction of changing Position and Scale non-linearly, so they might be a case where an intuitive result requires different behavior even if what's currently happening is technically correct. (I.e. if you are moving the center of your image and also scaling the image from that center, the results will not be what you think you're getting though they won't look wonky until you introduce non-linearity in both.)
But in my case, it's the simplest Position-only use case so I'm confident that either something is corrupted in my timeline/project or its a bug. Which, if it is a bug would make the other issues worse. Or might be underlying them. This might be the breakthrough we've been waiting for.

Resolve Studio 19 latest, Fusion Studio 19 latest, MacOS Sequoia latest, MacBook Pro M4 Max