$split doesn't support default settings?

Hi There,

This might be a known unknown since I'm using NR 4.0.9 - so it might be fixed already.

Or maybe it's not a bug? In which case what am I doing wrong!

It concerns JSONata $split:

The description gives me to understand that $split("fubar") is a valid expression and should give me the same as $split("fubar", ""), i.e. ["f","u",...]

[{"id":"4fa3f5ebb2b075ee","type":"inject","z":"427d65940cf71aac","name":"","props":[{"p":"payload"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"$split(\"fubar\")","payloadType":"jsonata","x":3289,"y":624,"wires":[["034f65b11c1f431e"]]},{"id":"034f65b11c1f431e","type":"debug","z":"427d65940cf71aac","name":"debug 27","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":3366,"y":512,"wires":[]}]

but it doesn't instead, I see this in the debug panel:

Screenshot 2026-05-13 at 10.08.25

Adding the separator value, i.e. $split("fubar", ""), works:

I know this is niche since JSONata is niche but hey!

Cheers!