The 1121 turnouts lack the non-derailing feature, but 1122 turnouts have it. Early 1122 turnouts do not need insulating pins. Later ones need insulating pins in the rails that lead to the frog.
If one of your turnouts is the more common later version and you have not used the insulating pins, then your turnout’s solenoids have been on whenever the track voltage was on. The solenoids are easily damaged by such continuous operation.
The 1122 lacks the internal switch found in the 022 and some other turnouts that turns the solenoid off after the turnout has thrown. Instead, it relies on the probability that track voltage will be off if a train is stopped on the non-derailing control rail. If neither control rail is insulated, the turnout will likely hum as the solenoids fight each other. An 022, on the other hand will chatter, because of the internal switch.