Interesting. There is some mysterious mojo afoot! My only guess is since it sat for a while, you've now experienced what it was doing before but, you didn't notice it because it was a gradual change whereas now, you're stepping into the full effect all at once.
I swapped vehicles with my Niece once. I had a F-150 Nite and she had a Mustang. We drove each other's vehicle for a few days. When we swapped back, we each thought the other had broken the other's clutch! My truck had such an easy clutch and her Mustang was incredibly stiff. When we got into each other's vehicles, we didn't know what to expect so, nothing was a surprise. However, we adapted to them quickly and when we got back in our own vehicles we immediately noticed the difference because it was sudden and we had preconceived notions about how they were even though we were wrong.
That's my best theory! It helps you in no way but, it's all I've got!
