Hey folks, Im wondering if I should be concerned or if this is normal.

My folding bike (Tern Link D8) has a 1x8 gearset and I’ve ridden it for over 2600km.

Today while lubing the chain, which I tend to do from the smallest cog while backspinning the pedals, I kept having the chain fall into the second smallest cog.

It happens when spinning fast, but also when it spins slowly.

I’ve checked the limit screws, and the derailleur barrel knob so things run smoothly when actually pedaling.

I don’t recall this happening in previous times I’ve lubed the chain, and I’m wondering if I should be checking anything else or chalk it up to being normal.