Get a cheap laser thermometer, or borrow one. Check each wheel after a drive. If any wheel is significantly hotter than the others, look at that wheel first. If the fronts are close to the same temp and the rears also, you probably don't have any serious problems, unless you can hear a bearing noise. Alignment might be worth checking.
Frozen e-brake cable or sticking calipers could create a hot wheel-wheels.
Bottom line is you are not coasting unless the transmission is in neutral.
regards
Mech
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