thanks for the response, yeah I use this Airport Enhancer HDX, which simply replaces the default texture, so it should be on the same level as default. What I don't get is why is the displaced threshold the only part of the runway that's covered with default texture, but the rest is custom texture? Also, I have CYVR installed in FSX, with airport enhancer installed as well, but everything is normal on that platform. In fact, in P3D, everything worked fine until I updated Couatl, and this started. This is pretty annoying, as the texture is just out-of-place.
I've attached another screenshot, this time showing the end of rwy31.
*update, I found out more about this problem. Turns out it only happens on where the runway surface is supposed to be concrete. The entire 26R/8L is covered with default texture (after deleting Airport Enhancer), but RWY 26R/8L (asphalt) is fine, except for the end of 8L, which is concrete. Same thing with the ends of RWY31, which is concrete, therefore covered with default texture. It might be due to missing texture, but the problem wasn't fixed after a reinstall. Any solutions would be much appreciated, thanks!