What firmware version were you running before you downgraded to 25.11? There are a ton of variables with a setup like this and it's difficult to pinpoint the exact issue. Its very possible that the AutoRF is not running optimal channels, so you could have AP's near enough that are on the same frequency, which means that you really only have a single cell instead of two cells. MR32's don't support RX-SOP unfortunately, so that's a shame. If you can, try setting up a static power and channel plan on a portion of the building or wherever your getting complaints. Also I'm assuming the SSID the teachers are using is 5GHz only?
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