Well, we know that they buggered the departure times for this leg of the race
Here they are in noontime sunshine when we know they finished the previous leg around 4:30 pm.
It's probably just to preclude the teams from ever catching the flight through Kuwait:
Thai Airways TG 519 leaving Bangkok at 1:00 pm and arriving in Kuwait at 4:35 pm.
Then they take Emirates EK 858 leaving at 6:05 pm and arriving in Dubai at 8:40 pm.
To get that flight they needed to be at Phnom Penh's airport in time to catch this flight to BKK (from Apskip):
PG932 0937 (actual 7/26) 1046 (actual 7/26)