When running the trains on my layout with an iPad (or iPhone), frequently when I sound the horn on a diesel the horn will remain on after pressing and releasing the button. At this point, the iPad no longer has access to any of the functions including speed, hence the element of danger. Next, I try refreshing the active engines and receive an error message, words to the effect failed to connect. I restart the app on the iPad and receive the same error message. Last step is to gradually reduce the track voltage.
This is a recent development. Do I need to replace the Wi-Fi interface unit?