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This solved our issues too! Although I had to run both commands on a windows 10 21H2 client. It didn't find 5009566 but did find 5009543. Great solution, M$ get it together!
With the MR56 we had very slow upload speeds which affected the clients poorly. Meraki identified an issue and fixed it with a custom firmware that is supposed to be released in beta 28.6. Do some speed tests on the internet with a connected client...