The most common reason for an element energizing while the machine is
off is that the element wire is shorted to a nearby metal ground.
Sometimes it is the element wire itself that has bent toward the
ground, and other times it is a piece of debris that has gotten in
there that connects the wire to ground. And if you want to know the
most common item of debris that can do this, it would be the underwire
of a bra. Anyhow, you'll need to get access to the element to check
it out. In theory, you can just bend back the element wire, or remove
the debris, but it is probably better to replace the element itself.

By the way, a grounded element would explain why you had to replace
the thermal fuse. An experienced appliance tech always checks this
one issue when replacing a thermal fuse.