When I associated R750 to SZ 5.2, it shows me below.
AP Image Signing: AP [RuckusAP@xx:xx:xx:xx:xx:xx] with firmware version [112.1.0.0.2146] is USI. USI to FSI upgrade is not allowed due to difference in Image formats.
I would like to know if you have upgrade problem with that, if so we might need to have you by logging case. Your AP is upgraded to 5.2 but you are seeing this alarm only?