Hello again @Retroguy82
The reason for that is Characters stop applying physics when they don’t have an assigned controller.
When you possess a different character, the controller is assigned to it and the previous character movement component stops applying physics.
How to solve it? Easy! Go to your BP_BaseCharacter, click on its Movement Component a search for “Physics” in its details. You will find an option called “Run Physics with No Controller” and set it true.
With that, your characters should apply physics even if you unposses them!
Let me know if it worked!