I just had a chance to test out the newest version of POPM and I’m also still getting the double entry problem. I’m using a Kindle Fire w/ SpaceDesk and the PMS750/650 with the BKSQ Turbine Duke. I’m really hoping there’s a fix for this because besides just typing in characters for flight plans, the double entry issue really affects things like radios/frequency swapping, zooming in and out, entering sub menus and so on.
Edit again: I didn’t realize there was an somewhat official thread here for POPM. I posted my problem over there as well: MSFS Pop Out Panel Manager (with Touch Panel Support)