I go here for the release notes: https://documentation.extremenetworks.com/XIQ/Release%20Notes/GUID-56C9DA15-4404-4EB2-B2C6-4FE10D5E1...
There's a link to 10.5 at the bottom of the page (https://documentation.extremenetworks.com/release_notes/IQ_Engine/10.5r1/downloads/IQ%20Engine%20105...)
This is a recurring theme here. I update the firmware on the AP's, and for weeks/months i get emails that AP "x" has lost its CAPWAP connection. If i get in the interface quick enough, i see the gray icon to the left of the AP, give it a few seconds, and its back online. Email after email with all different AP's around campus doing that. Then a few weeks before the release of the new firmware, no emails.... zero.... or Ive also had it where a new firmware has stopped that behavior, of offline/online, such as 10.0.4.5, with that one, no emails, but the firmware before that, lots of offline/online AP's and notifications.
So it appears that this new firmware has re-introduced that back into our environment.
Any ideas about that? and yes that VoIP checkbox on Sonicwall is checked, persistent NAT.