Orbits unstable, drift and decay gradually
I'm not sure if it used to do this, but I began noticing it after the update. I'm noticing that my orbit is changing very slightly over time. The orbit is outside of the atmosphere, and the option "Orbital Drift Compensation" is checked, but my orbit still changes gradually over time. The tendency is to lower both Apoapsis and Periapsis, but on occasion I have seen one or the other raised slightly. I have removed all mods and DLC, and I'm still getting this. So it's not being caused by mods.
I noticed this as well, and it really does feel *worse*.
This problem makes Hyper-Warping with my mod Time Control a big problem in low orbit, since with sped-up time you can see the changes to the semi-major axis happening much more quickly (even with zero reduction to the physics engine fixed delta time step). *sometimes* the changes stop completely for maybe a complete orbit or two, but then restart again.
Here's an example - I tracked the vessel's 'orbitalenergy' parameter over tim
