This has been a bug for quite a while, it affects not only grass but generally just ground textures at alot of airports. Spinning the “external camera” seems to fix it. The bug happens when you move the drone camera away from the users aircraft, and when you return the camera to the reset position, it often doesnt “load” the LOD fully around the plane it seems. Results in tiling grass with parts missing.
Grass as it should be. After moving the drone cam and coming back to external view, same tiles as OP.
Would like this to be finally looked at by asobo…