RKlimas—I have a MY2014 running a MY2018 UAQ with app version 28.3. (where yours is app version 22.6)
A few months ago, I had ordered the 2020 maps for a MY2019 after punching in my USA-ASO-8.4-MR-28.3-xxxx app version, and the maps they sent me was a different part number from the maps they are sending to me this time for the MY2018. The MY2019 system update/maps did not work for me and I returned them for a refund. They may send a system update for the MY2018 with the new maps. We’ll see what the update version is, as that will likely be the app version baseline required for the new maps. And, hopefully they work for me this time.
It’s going to be interesting because MY2018 UAQs are supposed to be running 21.9, 22.5 or 22.6 (via OTA) and some of us aren’t running those versions.
Edit: The notes for the MY2018 maps says requires the following minimum versions. IR shows 22.64+, where yours is 22.61. Odd. See below