Common eBike problems and solutions

Hey everyone!

Just got my first eBike a few months ago – a hardtail eMTB – and I'm absolutely loving it for my daily commute and weekend trail rides. I'm curious what common issues you all have run into with your eBikes, especially those of you who've had them for a while. What were the problems, and how did you fix them? Any tips for a newbie on preventing common headaches?