Seeking Advice on Persistent Washing Machine Issue

I kind of had the same problem.

What I did was to remove the washing machine drain pipe and fixed a normal water hose to the drain to see if it's a water capacity issue or flow rate issue

Found out that my drain system couldn't handle the flow rate of the washing machine water outlet and it's backing up. The drain pipe had a bend somewhere far away and it kept backing up water when the flow is higher.

My solution was to simply connect my washing machine drain to a large plastic tub to which I fixed a small hose that connected to the main drain. That way the pipes didn't get clogged up.

Got it fixed later ...but check that out first. If it's a water capacity or a flow rate issue

Have you checked the internal filter on the machine?

We once had a baby sock get sucked in there.

There’s usually a panel down low where there’s a mesh screen that filters the wash water before it goes down the drain.

You can usually find the maintenance documents if you have the model number of the washer.

Clear out anything in that filter and see if the problem persists.