Does the prayer of one who performs ablution for each prayer become invalid if the prayer's time expires while it is being performed?

Scholars differ regarding the invalidation of the ablution (wudu') of a person with an excuse (ma'dhoor) upon the expiration of the prayer time. The Shafi'is hold that it is not invalidated, and this is a strong and lenient opinion. Based on this, the questioner's prayer is valid. However, according to the view that ablution is invalidated upon the expiration of the time, the 'Isha prayer would be void and must be repeated, as mentioned in Hanbali jurisprudence.