Strange part is that I got it to come up once. All of the other F# commands are working side from F7. I was playing around with the PVT - INT - 1-2-3-4 dial and it came up once. The troops got in but couldn't get them out at the final destination.
Had same issue with the fast rope mission. couldn't get the decent menu to open when it was time to pick up the SF troops.
Should I be able to go into the decent menu as soon as it shows up or do I have to wait until I am next to the troops? I practically landed on them in the first mission and it still wouldn't expand.