Yes, that was one of my initial thoughts, too. (I don't have FTX Global installed). However, after doing some online research, I found many users who have experienced similar texture problems with FTX Global. A summary of what seems to be happening can be found by reading FTX Global - what is it really about?, which includes a quoted response from Orbx.
Below are some visual examples of texture problems on my FSX system.
Kandahar addon airport without any active FTX region
Kandahar addon airport with PNW region active
After experiencing the above texture anomaly, I did a complete reinstall of the Pacific Northwest region, but after doing so, the results were the same. Since I am the author of the Kandahar addon, I also looked at what I had put into the cvx file. The shape of the texture problem doesn't correspond to any change that I put into the cvx file. Then, I decided to see what happens to the Flight Simulator X default Kandahar with an FTX region active. The results are below.
Default Flight Simulator X Kandahar without any active FTX region
Default Flight Simulator X Kandahar with PNW region active
Kandahar is not the only airport in Afghanistan in which I found such a texture problem. As mentioned elsewhere online, the texture problems created by active Orbx regions can vary from one Flight Simulator X installation to another. Not all users will experience the same problems in the same places.