return your rd23 back to stock Xiaomi firmware and install OpenWrt again:
- stock RD23 firmware v. 1.0.49 (INT)
- official Xiaomi MiWiFi Repair Tool
- simple instructions with screenshots from another Xiaomi router can be found here
Also, someday the new RD23 might receive a Winbond chip (like rd03), so maybe it's better to use Snapshot images for the first OpenWrt installation (just to be on the safe side).