I haven't noticed anything like this particular to MR34. One organization I manage has over 100 MR34 across 4 networks that have been updated regularly and are at 28.6.2 now. I'm curious to hear back what you find out. I wonder if it could be POE related? Have you check POE budget and usage on the switch? Maybe something to do with "green ethernet/poe/EEE" that might try to put them in a power save mode?
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