The old kickstand plates pre-2013ish were A LOT thinner than they are now.
It didn't shear off because i noticed in time but the double plescher had severely damaged by Sisters MUSA Sam hillborne kickstand plate (bent it badly). It isnt a single time but repeated use with panniers full of stuff that does it. the plate would get twisting forces everytime the kickstand does the 'hop' as it is first deployed, during that hop it supports the weight of the ENTIRE bike then as the rear wheel lands back down it puts all the force perpendicular on the plate, eventually causing a fatigue failure.
Common problem on delivery bikes I have worked with as well, even with totallly over built kickstand mounts, the twisting action during deployment would always eventually kill the kickstand, whether it sheared the mounting bolt or the legs of the kickstand itself.