You still whipping this little thing
When using the dryer, on occasion, the blower goes off for a few seconds then comes back on. Does not happen often, just enough for me to notice. The drum still spins during this.
Also, lately, when there is a heavy load to dry, it will spin fine for the first 20 minutes or so, then the drum "hangs up" and will not turn.
Your dryer has 2 motors, one for the drum and one for the fan blower.
Kinda sounds like you have two issues
I don't know why or any good reason for turning off the fan blower motor at all, so this sounds un-normal to me! Might be a loose wire, loss of power from the control.
Second issue sounds more like something is weak and quiting ( hummmmming ), like a bad motor maybe.
A loose belt would certainly slip and would work better with smaller loads but I have not seen any motor quit and hummmm from a loose belt. A bad drum support could certainly bind and hold the motor back from running properly...but just spinning the drum would/should not allow a worn drum support to all of a sudden work.