That's an easy answer...
Why is it not possible to start more then 1 app?
Or perhaps a group of apps, because you can create group A and B.
For me it's easy to start VPN first and then MOL3, but for some of my family not.
Easy question get also easy answer.. Because the settings allow one app at once. Use request thread and post request for loading more than one at start.
z11Pronotmax wrote already good explain and solution.