If you have a circuit with an ender pulsar on it and you use creatives mode pick block to duplicate the block it will freeze the state of the ender pulsar.
How to reproduce:
Go into creative mode
Place an ender pulsar on a circuit base
Pick block the circuit
Place the copied circuit
The pulsar is now frozen in its last state
You must replace the pulsar to correct this.
Workaround:
Go into survival, pick the circuit up and then go back to creative.
If you have a circuit with an ender pulsar on it and you use creatives mode pick block to duplicate the block it will freeze the state of the ender pulsar.
How to reproduce:
You must replace the pulsar to correct this.
Workaround: Go into survival, pick the circuit up and then go back to creative.