Some people report unusual behavior with Teslas when charging in AC mode and in DC fast charging mode. In reality, almost always, nothing is abnormal; the problem is merely apparent. It's important to distinguish between the two: charging in AC mode behaves differently than charging in DC mode because the type of current is different. Furthermore, the first one is 220 Volts, the second one is 380 Volts. DC charging is superior because it's less prone to fluctuations, resulting in not only faster charging in less time, but also smoother and more consistent charging. Sometimes you get the impression that one charging is working properly and the other is not. This could be a problem if this happens despite changing the charging parameters and profiles. So, check, because changing the charging mode also requires changing the settings. If these aren't adjusted correctly, the vehicle may not charge, giving the impression of a problem. Some people think that the Tesla charge cablemight be the cause of the problem. The answer is no. The cable is also different and must be suitable for handling the current typical of that specific charging process. It's therefore not possible to simply compare the Tesla's charging behavior in the two modes; it's more useful to understand how to best adjust the settings to ensure proper and efficient charging.