Due to tangled scheduling, both Australia and South Africa had already flown to Dubai, with an ICC official saying the decision had been taken to allow the side that plays the semi-final in Dubai (Australia in this case) on March 4 the maximum time to prepare for that contest. However, it means South Africa find themselves in the sub-optimal position of having flown from Pakistan to Dubai recently, only to return to Pakistan soon after.
https://aiearth.us/trends/champions-trophy-india-vs-australia-in-dubai-semi-final-nz-vs-sa-in-lahore-semi-final/
