I no expert by far ... but I did spend the last several years on this forum
And my guess is someone is going to tell you that after you snap a crankshaft ... it probably should have be align-bored. If just one side of that bearing was showing copper ... I'd think either that shell was wrong in some way ... or there was a lot of crankshaft journal pressure on that one side of the bearing and not the other ... and if it's the cap side shell ... then that cap was tweaked when the crank went ... or something to that effect.
The next few posts will tell me if I have learned anything on this forum
Actually ... I have learned something, if I don't know for sure, just be quiet and wait for someone that does.