It is possible that given you specific bow setup that the arrows are significantly underspined, causing excessive arrow flex and ultimately seperation of the carbon wrap from the aluminum core.

A/C/Cs are pretty commonly known to be some of the best arrows made. If you have two seperate batches of them doing the same thing then it is probably something to do with your setup.

Please post the following
Bow, DL, poundage
Arrow length, tip weight.