What is the ruling on performing the Witr prayer during the 'Isha prayer time while traveling, alongside shortening the prayers?

The first part: Shortening prayers during travel: Travel permits shortening the four-rak'ah prayers to two rak'ahs, and this is a recommended act. The four-rak'ah prayers are Dhuhr, Asr, and Isha. The evidence for this is from the Holy Qur'an, the Sunnah of the Prophet, and the consensus of the Ummah.

The second part: Witr prayer when combining Isha with Maghrib in an early combination (Jam' Taqdim): A traveler may pray Witr after the Isha prayer that has been combined with Maghrib in an early combination.