Hey keewee, make sure your charging settings are dialed up to high in your vehicle’s system, and double-check that your charger is properly configured.
You can refer to the owners’ manual - it might have the info you need! Or if you’re using the Mini Connected app, it could provide you with the option to find or reset your Wifi password right there.
It happens to me pretty often too, but overall, it usually does the job just fine. There have been a couple of times when it went over the cheap rate or didn't restart after pausing, but honestly, it's been smooth sailing most of the time.
Mini doesn't give you the option to set a max charge like other brands do, and honestly, the range isn't all that impressive to begin with. So, I just end up charging it to 100% most of the time.