Same here: I upgraded my Duet Wifi (v1.02) from 3.2.0 (my first v3 firmware) to 3.2.2 and the printer got stuck and required additional help to get WiFi running again. I had used the new update procedure for the PanelDue (5" v3.0) just before that, just to mention that in case it helps. SD card seems fine though, if I can trust Windows...
@dc42 While searching on how to do this, I found your wiki help section "Installing and Updating Firmware" seems a bit outdated. It is still talking about iape4e/iap4s.bin being needed. Thankfully the M997 command complained about the missing Duet2_SDiap... file instead of showing me obscure error codes as some other systems might do.
(thanks @T3P3Tony for getting my account running again btw, the Akismet spam tool drove me nuts... now I can at least post something again even if it still bugs me now and then...)