Inertial mouse wheel events have screen position of 0,0. I use mouseWheel to zoom in/out my component around the mouse position. As soon as the wheel goes inertial, the zoom point goes negative top/left of my component.
I think it should be in MouseInputSourceInternal::handleWheel
if (lastNonInertialWheelTarget == nullptr || ! wheel.isInertial) lastNonInertialWheelTarget = getTargetForGesture (peer, positionWithinPeer, time, screenPos); else screenPos = peer.localToGlobal (positionWithinPeer);