Common eBike problems and solutions

Hey everyone!

I'm looking to buy my first eBike soon, probably a hardtail electric mountain bike for some light trail riding and commuting. As I'm doing my research, I keep wondering about common issues people run into with their eBikes, especially after a few months or a year of use. What are some of the most frequent problems you've encountered with your eBike (battery, motor, brakes, electronics, etc.) and, more importantly, what solutions or preventative measures have you found helpful? Any tips for a newbie looking to avoid common pitfalls would be awesome!