I turned on clicky clack using the app on two individual engines. Those engines are now in a lashup running. After about 30 seconds of inactivity, the engine sounds fade away and the Clickity Clack comes on. Horn and Bell no longer sound. The only way to get Engine sound and horn/bell back are to adjust the speed. Then Clickety Clack goes away and Engine Sounds come back. The process repeats again after about 30 seconds of inactivity.
Is this normal?