Hey there,
That’s a good observation, but those solo rides aren’t affecting your Progression Levels. We recently released some improvements to how we recommend workouts, which is likely why you saw a change in some of your prescribed workouts’ levels.
Also, all of those solo rides could be affecting your fitness as well, which, in turn, translates to better performance in your workouts, and ultimately, higher PLs.
Let me know if you have any other questions! 