Abdozy Nope. With that configuration plugin will always set config.engine.ignition.status.changed parameter to true.
In order to detect the change in the expression field enter "config.engine.ignition.status != previous('config.engine.ignition.status')"
Also be aware that live communication with flespi support team is available via integrated chat located in top right corner of your flespi.io account. I suggest you to address any questions using chat which is usually much quicker.