Trouble in simple Software Serial code testing

Some months , not coding on Espruino and I started trying "software serial" code on Pico with pin A6 and A5 connected with wire, such:

var s = new Serial();
s.setup(9600,{rx:A6, tx:A5});
s.on('data', function (data) { print("<SoftSerial>"+data); });
s.print("Hello");

But the result :

>
 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 2v01 (c) 2018 G.Williams
>
<SoftSerial>¤²¶
<SoftSerial>¶
<SoftSerial>o
> 

Always only last character is correctly detected on event data received, for every send package of characters.
Is there a mistake in my code usage ?
Thanks.