Hello, i don know if you figured it or not but i have similar problem. In my case rear left wheel is a much hotter than others, i can not keep my finger on it.
It looks like there is very small friction between pads and disc, really small.
First i thought it was bad servo, but i swapped left and rigth but nothing changed, than i checked cables from J540 to left servo if there is any resistance but not, than i checked how long is J540 sendig signal to servo for opening pads, on left side it is 160ms and right 200ms, so barelly any difference.
Than i changed break calliper, and also brake hose and bleeded it, break pedal is hard as it should be. In N you can spinn with wheel but you can also hear a little friction. I do not know what it can be.... maybe abs, esp module? No errors in diagnostic.
