What is the ruling on performing the Qiyam prayer after combining the Isha prayer with the Maghrib prayer at the time of Maghrib for a traveler, and before the time for the Isha prayer begins?

The time for Qiyam al-Layl (night vigil prayer) begins after the 'Isha prayer and continues until the advent of dawn, even if 'Isha was combined with Maghrib as jam' taqdim (earlier combination). Tarawih prayer is a type of Qiyam al-Layl specific to Ramadan. What was performed is considered Qiyam al-Layl.