Common eBike problems and solutions

Hey everyone!

I've been riding my Aventon Level.2 for about six months now, mostly for commuting ~15 miles daily on paved roads and some light gravel paths. I've been pretty lucky so far with minimal issues, but it got me thinking: what are some of the most common eBike problems you all encounter, and how do different brands seem to handle them? For example, do certain motor types (hub vs. mid-drive) or battery brands tend to have more specific quirks? I'm curious if folks have noticed patterns in reliability or specific issues across different manufacturers.