I think you may need to alter how your Lifeguard flights display. Check out the BFI scheduled departures. You’ll see flight ‘N101’ showing to depart to Honolulu.
I’m pretty certain that this flight is in the FAA system as ‘LNI01’ (lima novermber india zero one) which is the 3-letter ID for Lion Air.
I believe that something in your scripting is making it think that this is a Lifeguard flight (prefixed by Lima) and is automatically removing that to show the “American” reg, converting the ‘I’ to a ‘1’ in process.
Reading some old topics on the subject of Lifeguard flights I see that you decided to change how they display by automatically removing the ‘L’. It appears that they can’t be searched by their actual callsign either - eg. LN55FN is currently airborne as I’ve just heard it on the radio, but typing that into the tracker turns up nothing, but it finds it okay typing in just the reg (which isn’t the official ARCID).