It appears none of the customers know what the second problem is, so it must be pretty minor for nobody to know what that second issue is.
The can not fitting one of their rifles, is essentially an issue, but there isn't exactly a rule that new product needs to fit the older platform. It is a best practice, but the geometry they are using to put a cover on essentially is an answer to a new issue the can was developed in response to.
I guess it is pretty early also, and maybe the cans haven't been shot much in consumer hands yet.