Problem Or As It Should Be F7a Bell Alert In 2nd F7a?

I was trying a f7a/a with a caboose in tow and while trying to get use to the controls my train shutdown and needed restarted 3 times but the restarts were not the problem each time the bell in the 2nd loco would kick on and i needed to go to the 2nd loco to shut it off.The 1st locos bell didn't come on and it's shut off didn't affect the 2nd locos bell.

 

The bell props turns on as an alarm that the engine has been killed