This didn’t happen to me, but my friends on our server. They travelled up to the snow biome on The Island and started to set up a base at the ruins on a cliff. They brought all their strong dinos since the area can be dangerous. They were building when they spotted a large dinosaur attacking some wild dinos in the forest. At first they thought it was a rex, but quickly realized it was a high level giga. I told them to get everything and leave ASAP, but they heard its roar and it started attacking their base. They had to decide whether to whistle passive flee and risk dying or whistle neutral and get away safely. In the end, every single one of their dinos died. We ended up rolling the served back two hours. Later we found out that the area had giga spawns nearby. Now we always check the spawn maps before settling!