I had 2 actors that had HISM component and cesium globe anchor component. One was spawned from Game State on PostInitializeComponents() and another was spawned from BeginPlay triggered from another spawned actor. One that was spawned on PostInitialize in Game State does this weird flickering of the instances of HISM Component. I am attaching a video. While the one that was spawned on begin play those HISMs look normal. Any idea why this happens? (I am curious to know)
Found the issue. They were being spawned before the Cesium GeoReference origin was being changed. That time FVector(0,0,0) was too away from the new origin. But for the other actor that had HISM and worked fine was being spawned at the new origin itself. So I just have to make sure the HISM actor is not too far from origin.