"This..." Rean and Roan didn't expect that. The system had already given them a quest related to the foreign fragment, so they thought it wouldn't intervene again until the quest itself was completed.
Still, there was one time the system intervened during a Spatial Transfer. It was back when the twins made their way to the Realm of Gods. Back then, the twins entered the portal to guide them and their friends to the Realm of Gods together, expecting to be brought to the Demon Beast Races' Territory. Yet, the system suddenly activated and changed the coordinates of their spatial transfer.
Later on, the twins found out the reason for that: The first Universe Foundation Fragment. They ended in a continent where the fragment resided, being protected by one of Soul Gem's old friends. That friend had a talk with Soul Gem's soul. He eventually passed the Fragment to the twins and let his own soul dissipate so he could finally reincarnate.