If I’m not totally mistaken, this happens basically on every map and is likely caused due to initial setups, asset loading and all sorts of server jobs during the initial state of the game. Originally I thought that my SG project did a lot of work at the start, because every component has to start simulate during the same tick, but I noticed that even live maps from other creators have exactly the same behavior.
Personally I would like for epic to solve this problem, but I’m not sure if it’s actually feasible.