Artillery observer selection issue

[Imp]

How about this..... spend 2/10's of a second to click on the B0 unit after you've done all the other things BEFORE you exit the HQ menu

OR ( even better )

don't enter the HQ menu at all, simply press the 5 key to show/hide the unit ID detail and the game will happily remember it was the B0 unit that was the spotter.

Hence reason never mentioned