Common eBike problems and solutions

Hey everyone!

I'm looking to buy my first eBike soon, probably a hardtail mountain eMTB for some weekend trail riding and commuting. I've been doing a ton of research, but I'm curious about real-world experiences. What are some of the most common issues or problems you've encountered with your eBikes, especially after a few hundred miles or on varied terrain? More importantly, what were your go-to solutions or preventative measures? Thinking about things like battery degradation, motor glitches, or even just weird creaks and groans!