Sounds like your washer doesn't have a connection to your "stack pipe". As water moves through a drain pipe, it creates a vacuum behind it, the "stack pipe" or "vent pipe" is usually a pipe that goes through the roof of your house and provides an open air connection to all of your Plumbing fixtures so the vacuum is provided a way to suck air rather than sucking the water out of your "P" traps or other fixtures such as your toilet.
Chances are your toilet is also "sucking" from your washer, but you just don't notice it.
It is also dangerous because if the washer or other fixtures are sucking water out of your "P" traps, then you may be getting methane and other sewer gases into your house.
Have a pipe run from washer drain to your vent pipe and this should eliminate the problem. Be sure it connects to the vent pipe because if you ever have a sewer backup, the vent system won't allow the gray water to empty into your house through the air pipe.
its not vented properly or at all...how does raw sewer feel on your skin?
It might be plumbed wrong -- or either your sewer is stoping up --
seal to stop water from runing into tank located between tank and bowk
You have to use toilet more
Sounds like a venting problem. The washer is trying to push the water down the drain and the tub is an easier route. When it stops pumping, the washer drain become the vent and lets the air escape. You can try some drain cleaner in the tub and the washer drains. This may open it enough to help.
When you pull the handle a washer is lifted and the water goes down into the toilet and at the same time the cistern fills up once the washer is back in place from the flushing mechanism
It depends on what kind of washer you have! Normally the water will drain on it's own, though it takes time because the drain doesn't suck it in or anything - it just drains out on it's own; but it still depends on the type of washer you have. If there isn't a drain in the bottom then you'll probably have to scoop it out or something, which is probably some back-breaking work. Check if your washer has drains in the bottom.
There is a slight blockage somewhere in your waste drainage system
It goes into the main sewer system. It will go through your sewer system and then out to the main sewer. That is if you live in town!
It lets the water BACK into the pool after it's been "filtered" through the filter.
because the flushing washer is broken and needs to be replaced, or the inlet washer is broken and the water is over flowing into the pan
Most Americans use 5 gallons of water per day. That's a lot of water, most of it going down toilet and shower drains.
The washer in the shut off valve has probably split or come off completely over time.