While making adjustments to my station I must admit being guilty to triggering LEILA (I'm sorry, guys!).
But, I found that I didn't hear LEILA, I only saw LEILA on monitoring. So I investigated closer.
When sending a carrier, my radio sends a carrier on "carrier frequency" of the USB signal. Using USB means that the modulation will be above the carrier frequency.
When LEILA triggered, I found it sends a carrier on the frequency it "discovered" and a lower frequency. That means the LEILA signal will be outside my filter, which explains why I didn't hear it.
My question: why does LEILA use the "discover frequency" and a lower frequency for signalling instead of using a higher frequency so it would be in the passband of my receiver?