My children are flying to Bali from the U.S. with a 6+ hour layover in Doha. Do you know if there would be any issues with them purchasing a Visa on arrival and leaving the airport during that time period? 15 hour travel time from the U.S, another 6 hrs in Doha airport, then another 11.5 hours to Bali is so long. We’d like to pick them up during the Doha layover to give them a break. Any reentry problems to airport and gate that could arise? Thanks!