There is a cable test function you can run on your MS switch. I would try that for a few of these ports to see what result you get.
It is possible you have some faulty units. Since they have never worked the next steps would be some basic troubleshooting like moving them to known working port and trying a factory default. It would be a bit unusual to have that many faulty, but support should replace them quickly if you can demonstrate they do not work.
The quickest test I can think of would be to swap a working MR with one of these in repeater mode and see if the trouble follows the MR or the cable and switch port.
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