I’m pleased to announce that my CTD issue (described above) involving Orbx KTIW and Pilot Plus EGTB (both bought from the marketplace) is now 100% solved after installing the latest marketplace update for the latter.
However, given the response I got from Zendesk and the third party developer (ORBX in this case), and the total time it took for the issue to get fixed, I’d now be waiting exactly 6+ months before buying my desired addon/s for MSFS 2020 from the marketplace, which is the only place I have always bought and will be buying MSFS 2020 addons from.