How This Differs From the Android Volume Fix
This iOS issue concerns when the music stops. The Android v1.2 fix concerns whether an in-app control changes music volume while the app is in use. Lowering your iPhone’s media volume may silence the sound temporarily, but it does not show whether the exit issue has been fixed.
What to Check if Music Continues
Notice exactly when it happens. Did you leave the game screen but keep Mega888 open, return to the Home Screen, or fully close the app? Those actions are different, and the published entry specifically describes music continuing after exit.
If you can repeat the behaviour, note the iPhone model, iOS version and the game or screen that was open. Also check whether the sound is coming from Mega888 rather than another app still playing audio. A short description of those details will make the report much easier to investigate.