I only have one map atm it is a fairly new project so I haven’t looked into level streaming. I noticed online some people were having similar issues with 4.24.3. When I have a chance later today I’m going to create a new template project and see if it still happens, then install the 4.25 preview and see if there is any change in performance if it continues in the new project. I’ll post an update later when I have time.