I am pretty sure that the desired result in the display when the timer is in the off position is to have the minute value blink.
The problem is that the system is still operating with a mind of its own. There is a design flaw that has been corrected and if your problem is with an ESP 4 modular controller there is a repair part that you can get free of charge from any professional irrigation supply house like a Ewing, Horizon, John Deer. There is a fix. This problem has been a problem for a lot of contractors and I am one of them.
I hope this was helpful.
I like some rainbird, but I have moved towards the hunter pro-c.
The repair part is worth the fix because it is free.