I'm always available for you to ask me these questions directly! 🙂
The issue with the Dual IP mode was a certain set of circumstances and a bug which affected APs being adopted in SZ5.2.0 and is now resolved in SZ 5.2.1 AP firmware and SZ 5.2.0 with AP Patch 184.108.40.206.5030.
Once the APs are adopted and updated to SZ 5.2.1 or 5.2.0 with the AP Zone running AP patch 220.127.116.11.5030 then the issue goes away and you can re-enabled dual-IP mode on the Zone.
Full details are in the Tech Service Bulletin here: https://support.ruckuswireless.com/articles/000010443
I hope that helps clarify, please let me know if you need any further details.