iPhone app Buttons dont always work

[areeba-a-abid]

Buttons sometimes dont respond as expected. Issues I saw:
-'Next' sometimes doesn't do anything
-Hitting 'Redo' sometimes went to the next ayah
-Pressing the record button after reading didn't stop the recording
These were not consistent bugs though, they disappeared when the app was restarted.

Also, its unclear what the redo button does, would be better if it just said "Redo"