Chaos fields not working


I’m trying to create an explosion with chaos and chaos field system. I got this code from a tutorial. It seems to work fine at first, but the pieces of fractured geometry that have already been affected by my explosion field and have stopped moving don’t get affected by explosion’s velocity. So, at first they are affected, but when they get to the final fracture level and stop moving, they cannot be moved with linear velocity field anymore. What did I get wrong? Please help me, I’m a beginner with unreal engine.