Chainsaw Repair

I have talked to local stihl dealer and he says they are having some problems but that he is not sure exactly what they are at this point. I have had 6 261's with the crank wore where the clutch bearing rides on it and a couple 362's with the same problem along with a 362 that the big end rod bearing failed on.362 with rod bearing failure has a perfect piston and cylinder. I dug the 362 out from under the bench to take a picture. it has been hanging around the shop for 6 months and decided to add it in to my questions about the 261. Anyone else seeing these issues or do I pass these all off as isolated cases of operator error.

I've replaced a few clutch drum be Rings on our 32 ' and never noted any odd wear.  Could the plastic cages be melting from abuse and thrashing the surface?

My guess is a bad case hardening/Nitriding on the crank assembly.  I've replace a lot of dry burned up clutch bearing from abused saws and never seen an issue with the crank itself