yeah I was able to replicate the issue. this is with the 4.13 preview. on a new blank project. If the physics object is not moving, it registers the first spot it’s at. when the physics actor moves. no more registration of the perception on sight.
So the steps I took was using the props provided by the AI training stream.
I created an actor out of blueprint. added a static mesh. used the apple. added a AIPerceptionStimuliSource. auto registered it. set it to sight. then I called the blueprint node
Register Perception Stimuli Source. set it to sight, applied “self” to target. and of course set to simulate physics on static mesh.
Added it to the world, with a pawn that has a AI controller(BP) with an AI perception attached. and the teams were all highlighted, so it can grab all teams. no other steps.