I am wondering also if there is a possibility marketplace add ons may have an influence on this.
For example, the London City area I tried to cache lies within the area for which I have installed ORBX’s London City airport and London City Landmarks. In particular, I am wiondering if the latter, with its probable exclusion polygons for photogrammetry, may be having an influence here. As these are market place purchases they are not in the community folder and I haven’t yet tried to cahce this area with these removed.