I have a Tab S5E. A couple of months ago, the fast charging quite. When I plug into my Samsung Fast charger (EP-TA200), I get a warning that tablet is not fast charging. I have tried several chargers and cables. They all provide the same results. But when I plug my Galaxy S20 into the same charger and cable, it does show fast charging. I accepted that there was maybe an internal issue with my tablet. But I was recently traveling and when I plugged my tablet (with the same cable) into one of the generic USB outlets they had, my table did in fact fast charge. Any idea as to what may be causing this?