If a prayer was combined by way of advanced performance (jam’ taqdim) due to an excuse, then the excuse ceased to exist before the time of the second prayer, does the combining remain valid, or must the prayer be repeated?

One who combines the 'Isha prayer with the Maghrib prayer, as a jam' taqdim (combining by bringing forward) due to a permissible excuse, and then that excuse ceases during the time of 'Isha, is not required to repeat the 'Isha prayer; for it was valid and sufficient.