There is a bug in version 4.19.2 of the engine with World Compositor. Basically, when you make a map bigger than the world bounds of 20x20km, your tiles begin to turn white, black and even disappear, some of them are hidden and when you click on the little eye to show them, half of the other ones that were previously visible become hidden plus you can’t center the whole map.
I have disabled the world bounds and I have enabled the origin shifting option.
I have tested the same thing on 4.17 where everything works well.
Apart from that, version 4.19.2 keep crashing with the classic error that says “not enough debugging symbols”.
These issues need to be addressed ASAP as 4.19.2 is currently unusable.