Physics is a problem for frontloaders. The drum is held in place by springs and I suspect one of them is broken so you’re not getting the dampening you need.
We have a Whirlpool frontloader, about 10 years old. Sometimes, and increasingly so, it refuses to start because it can’t control the door lock. The accepted solution, and I kid you not, is to give it a good whack with your fist in a specific location while pressing the start button.
We are not going to buy any more Whirlpool frontloaders.