I would like to see non-timed solo missions remain active after log-off especially on mobile devices. Do to length of time some take to complete it is neccesary for some of us to log-off before a mission is completed. When logging back on the mission is no longer active. this neccesitates flying all the way back to the originating SP or trying to start a new one from where we are at.

It'd probably be a good idea to to give some examples.

I'm not sure he has to. There are a number of missions that need to be completed in one sitting; I have no idea why.

A lot of them say why in the mission description.