The right door of my Kenmore side by side

need to level the refrigerator properly where the doors will gently close themselves. it is normal for the doors to pop another door open if closed rapidly. model number?
APPLIANCE 911

This happens because the refrigerators of today are air tight, the fresh food door pushes the air into the cabinet as it closes and the air has no place to go but up the air vent into the freezer and "pops" open the freezer door. First thing is make sure the freezer door is capable of closing properly and is not rubbing or catching anywhere. I sometimes add a washer or 2 to the center hinge under the freezer door so it doesn't rub anything. Put a little Vaseline ( or food grade silicone lubricant ) on the hinge side of the seal. I then raise the front of the refrigerator so that the front of the refrigerator is a little higher than the back of the refrigerator. Never level a fridge with a level. Once you have the door closing properly and front slightly higher than the back...let the fresh food door close from 90 degrees on it's own and the freezer door may "pop" open a little but will close again on it's own...and stay closed once all is set up properly. We see this more often now and have no trouble with the door staying open again after setting up the refrigerator properly.

Seals don't lose their magnetism. Check the door closes all the way round and adjust the hinges if it doesn't sit straight. Check there isn't a relief valve frozen up or blocked (it allows air to escape when the doors are closed). Check the drawers are fully pushed back in and not stopping the door closing properly

from the description given I came up with;
possibly the screws are lose on the top door hinge, the top or bottom hinge is worn, the door is warped or damaged.

You're going to need to adjust the hinges on your frig and/or freezer doors.
Your cost: $zero.
There's one hinge at the top of each door & one at the bottom. The hinges at the top are
covered by a triangular shaped piece of plastic that pries up easily with a screwdriver or tack
puller - remember to put down a thin piece of cardboard (as from a cereal box) to protect the
finish on the appliance.
These screws take a 5/16ths inch socket.
Check the screws holding the top hinges first, since they're easier to get to. If the hinges on
either door are loose, you've found the problem - align the doors so the frig door doesn't also
pop open the freezer door and you're done.
If the hinges at the top of the doors are secure, then your problem is with one (or both) of the
hinges at the bottom - probably best to adjust them after emptying the door(s).
These hinges also take a 5/16-in tool, but it'll have to be a combination wrench with a flashlight,
and you'll have to lay down on the floor to adjust these hinges.

The lower hinge on each door may have a door closing cam. It raises the door up ¼ inch when opening and this assist in closing the door. If it’s wore out and doesn’t work the door may not seal and the gasket can be damaged. Watch the operation of the door to see if it rises up when opened.

Leave the door shut and let the magnetic gasket hold the door in place. Put something between the bottom of the door and the floor to hold it in case it slips.
Remove the bracket holding the pin and hinge assembly taking note of order of removal of parts. Slide new cams on. You probably need two.

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Leave the door shut and let the magnetic gasket hold the door in place. Put something between the bottom of the door and the floor to hold it in case it slips.
Remove the bracket holding the pin and hinge assembly taking note of order of removal of parts. Slide new cams on. You probably need two.

The lower hinge on each door may have a door closing cam. It raises the door up ¼ inch when opening and this assist in closing the door. If it’s wore out and doesn’t work the door may not seal and the gasket can be damaged. Watch the operation of the door to see if it rises up when opened.

To level the entire unit the front or rear legs should be threaded for adjusting.

replace the door cam assy. and door stop.

After reading these posts, I fixed my refrigerator door in less than 5 minutes. The little black plastic cam on the bottom hinge was loose. To fix it, take the hinge cover off of the top with an 8mm socket, and remove the three 8mm screws holding the top hinge on. Remove the door by lifting up off of the bottom hinge and set it aside. On the bottom hinge is a black plastic cam held on by an 8mm screw. The screw on mine was really loose. Tightening it and putting the door back on made it work like new. You probably don't have a bad cam, just a loose one.