During a DJ performance with rekordbox (iOS/Android) and the XDJ-AERO connected by Wi-Fi, communications were cut off after I left the message dialog of another application displayed.

When rekordbox (iOS/Android) is running and the message dialog of another application is displayed in the foreground, rekordbox (iOS/Android) processing continues in the background. However, applications running in the background may be suspended or stopped due to iOS or Android operating system control.
If a message dialog is displayed, close it promptly and set rekordbox (iOS/Android) back to the foreground.