I just imported and painted a massive tiled landscape (perhaps not that massive, as it is 6 km2), the resolution is 14,791x14,791 and the total component count is 841.
Only when I play in editor do I have an issue–a massive square hole appears in the landscape further down from the camera. When I come close the tiles reappear, but from far away the holes pop in. What do I do to fix this problem?