We are also having the same problem. Smaller scale we have 4 MR42s I had 2 of the MR42s replaced via RMA with Meraki. I got about 4 weeks out of the new MR42s before the problem comes back. It is not as severe as we get about 20-40Mbps on the my.meraki.com speedtest But with my MR33s I'm getting 285-385Mbps up and down. I have also been working on this issue for many hours with Meraki. I bought Meraki to avoid issues like this. There is no way to even schedule a reboot as far as I know. At this point I would reboot them once per week on the weekend. I'm a bit concerned in pushing the new 28.4 beta as I've read a post that it can cause some kinda of reboot loop.
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