Lookup problem with character '/' in the data (v2026.11)

I have a project colum with data like "M5024403/0123". While I'm typing M5024403, the lookup records are found. But when I type '/', the response is empty.
The lookup url:

https://mydomain.com/api/lookup?q=m5024406%26023&n=10&rnd=111750&start=-1

The response:
{
"page": "ParteTrabajoAdd",
"field": "proyecto",
"result": "OK",
"records": ,
"totalRecordCount": 0,
"sql": "SELECT id_proyecto AS lf, id_proyecto AS df, descripcion AS df2, \u0027\u0027 AS df3, \u0027\u0027 AS df4 FROM proyectos WHERE CONCAT(COALESCE(id_proyecto, \u0027\u0027),\u0027, \u0027,COALESCE(descripcion,\u0027\u0027)) LIKE \u0027m5024406\u0026023%\u0027 AND estado = \u0027Pedido\u0027 AND delegacion = \u0027M502\u0027 ORDER BY id_proyecto LIMIT 10"
}

It seems there's a problem with the url encoding for /, being %26 instead of %2F

I think this behaviour start with version 2026.9 or 10

Thanks