The freezer door of my Whirlpool freezer on top fridge can slide up and down - is there a way to stop this or tighten it? Everything I'm finding online is about replacing the gasket or stopping the door from opening on it's own - it's fully aligned, but seems like it should be sitting up and locked in place higher.

Everything seems to get crystally so fast and I think it's a problem with the seal overall, even though the gasket is tight and flexible. I realized that the door itself sort of seems to be sliding up and into place when I close it, and that when closed/sealed, the door can be moved vertically up and down.

Model info:

Whirlpool WRT518SZFM00