M4100-26G-POE - recurring overload fault on ports 17 - 24

I have a M4100-26G-POE that I bought a few weeks ago and I'm seeing recurring overload faults on ports 17-24 only. I've used the exact same cables and devices on ports 1-16 and they all work fine, but if I move the cable over to one of the upper ports it will work for a few minutes then reset due to an overload fault every few minutes or so. Nothing is wrong with the cables or connectors and like I said it works fine on ports 1-16. Ports 1-16 are configured the same as ports 17-24 in the web page.

What I would like to know is if anybody else has seen a similar problem. Specially, I want to know if this is a defective unit, a hardware design flaw, or a issue with the firmware(initial version for this model). I tend to think this is probably a defective unit, but I wouldn't be shocked if this is a firmware issue.

I want to know because I don't want to go though the expense exchanging the unit for the store or swapping it out on warrantee and getting a replacement that is a refurbished model unless something is actually wrong with the hardware. I'm not sure I see myself using more then 16 POE ports in the foreseeable future.