Avoid getting stuck due to missing ball placement command

It is still possible to get stuck if there are two game events after each other, both stopping the game. The second one will cancel the ball placement in this case.

internal/app/engine/engine.go

@@ -382,7 +382,9 @@ func (e *Engine) postProcessChange(entry *statemachine.StateChange) {
 	}
 	if change.GetNewCommand() != nil &&
 		*change.GetNewCommand().Command.Type == state.Command_STOP &&
-		entry.StatePre.Command.IsRunning() {
+		// include STOP from last state as well, as game events may come in shortly after state changed to STOP
+		// for example if two robots dribbled ball to far, autoRefs will trigger two events after each other
+		(entry.StatePre.Command.IsRunning() || *entry.StatePre.Command.Type == state.Command_STOP) {
 		e.processRunningToStop()
 	}
 }