Not sure which left you refer to but I noticed in pic, the top right gizmo as the white thumbscrew all the way down while the left one is all the way up. Perhaps adjusting one of these will help?

 

I have never seen that before but I do see differences from one side to the other.

 

I have never seen that before but I do see differences from one side to the other.

Good catch.
Particularly the adjustment at the top of the photo (closest to the front of the drawer) --- first, that can't possibly be right, and second, could be that one of them being at the extreme position is keeping it from being latched properly.

It could be that one side of the drawer is maybe a 32nd of an inch different from one side to the other, but when when side is adjusted all the way in one direction and the other side is adjusted all the way in the other direction --- it's just not right.

 

I found this video which may help.

 

Thanks all. Good catches on the positioning of those white parts! Didn’t even catch that.

but that’s not the issue - it was that the tension was lost on the broken latch side. I couldn’t do it the first time but just tried again and was able to remove the blue “handle” to discover the piece is cracked. That’s why there was no tension!

argh - probably now just have to pay for an entire new set to fix. Maybe I’ll try to super glue it and see if it works first.