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Check that there are 2 stabilizers on top of the door frame. They bolt to the door under the rubber glass wiper.

Check the window regulator for tightness. Sometimes someone will go in there and the bolts will be loose.

Make sure all the window channel guide inserts are there and secured to the door.

 

Thanks for the info. The guides are all there. Just unusual for me I guess. Never had a car where the door didn’t go around the window while open. I don’t like grabbing glass while getting in and out. I feel like something is gonna break. Thanks for confirming it is a normal condition.

 

Not a "normal" condition! This is how it gets when the stabilizers are worn out or out of adjustment (BTW there are a few more stabilizers at the top, some outside the glass and some inside).

The outside stabilizers can also scratch the glass in time, especially the driver side as it is most used. Everyone should replace those stabilizers by now due to the age of the gen 3 cars.

Another contributing factor may be the rubber around the top of the door opening getting old. You may want to replace that while it is still available from Subaru (I'm not sure it still is).
I agree that the frameless window design is fancy but not as robust as the regular design as you clearly see. It is also much harder to adjust for proper window seal. Adjustment is described in FSM, too long to describe here.