Don t know much about soft close or if all are alike but there s probably a dampener piston in the slide mechanism that s gone bad and may be adjusted or replaced maybe sorta like a storm door piston.
Soft close door hinges not working.
The door will fail to close at either the top or bottom.
If your soft close cabinet slams shut it could be because the door is overlapping the neighboring door and hitting it before the soft closing mechanism has a chance to fully engage.
Sorry for the bad news there s not much fixing these internal mechanisms.
If a hinge leaf is recessed below the surface of the jamb or the door edge the door will not close well and the hinge will bend when you close it.
Often euro style hinges like yours are formed together around the dampers for soft closing.
10 gets you a new pair.
If many or all your drawers are acting up may be an issue with brand or model.
Use a hinge leaf as a template to make a cardboard shim that you can slip behind the leaf.
Soft close cabinet hinges stopped working soft close drawer slides cabinet door damper lowes self how to adjust soft close hinges 7 steps with pictures wikihow.
If the hinge leaf is recessed only at the bottom or the top insert a shim behind only part of the hinge leaf.
Allow the door to spring back open.