Brian
Found the cause of the problem on my LG GPAD.
I mount this 8" tablet on my knee board.
I hold it in place with the top clip that is supposed to hold paperwork with airport and nav information.
It seems that if the clip is even slightly touching or putting pressure on the glass, this counts as a tap or touch.
So if there is already a touch on the glass, another touch will do nothing.
This accounts for why the touch/tap feature would work with all my other apps. Because it was not on my knee board at that time.
So pilot error...again.
John