Why does one of my team always refuse to get in a vehicle the first request?

[AntiArma]

Whenever I tell my team to mount a vehicle, nearly always one of them will not do it the first request,
yet they will do it the second time, when I issue the same command a few seconds later.

They generally say 'negative' when issued the first command, and the 'ready' will appear in their HUD icon.
On the second command, it'll say 'mount' in their icon and they'll board.

Is this supposed to be part of the game, like one of them is supposed to be covering the rest
while they get into position within the vehicle?

It's soooo annoying having to double check that everyone got in every single time.

I looked for the answer to this for a while but couldn't find it.
I'm not using any mods. I'm doing single player scenarios and campaigns.

Thanks.

[Jim Brown]

Best thing to do is get in first, then tell them to board because if you tell them to all get in and you then pop in as driver it confuses one of them who was about to be driver,or tell them all to get in and you go in last but you wont be driver then,.

[AntiArma]

That makes sense. I've been telling them to get in and then boarding myself before they've finished mounting.
I'll try it another way.

Thanks.

[Dale]

Although game-play dictates that you get in first, you should always be the last to get in and the first to get out as a SQL.

As a tactical ideal you generally should be ensuring you count everyone who gets in and out of that vehicle to ensure you haven't left anyone behind