Custom icon fails when calling multiple custom icons from the json url

My custom icon collection doesn't return more than 1 icon, If I call just gmail or dot-circle, it works, but it doesn't work for multiple icons, from the URL (http://localhost:3000/api/_nuxt_icon/custom.json?icons=dot-circle,gmail) I get the following JSON.

{
   "prefix":"custom",
   "icons":{
      "dot-circle":{
         "width":32,
         "height":33,
         "body":"<g fill=\"none\"><path opacity=\"0.2\" d=\"M16 28.8047C22.6274 28.8047 28 23.4321 28 16.8047C28 10.1773 22.6274 4.80469 16 4.80469C9.37258 4.80469 4 10.1773 4 16.8047C4 23.4321 9.37258 28.8047 16 28.8047Z\" fill=\"#D324FC\"/>\n<path d=\"M16 28.8047C22.6274 28.8047 28 23.4321 28 16.8047C28 10.1773 22.6274 4.80469 16 4.80469C9.37258 4.80469 4 10.1773 4 16.8047C4 23.4321 9.37258 28.8047 16 28.8047Z\" stroke=\"#D324FC\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"/>\n<circle cx=\"16\" cy=\"17\" r=\"3\" fill=\"#D324FC\"/></g>"
      }
   }
}

Reproduce the request at /api/_nuxt_icon/custom.json?icons=dot-circle,gmail and compare it with single-icon requests. Trace the custom icon JSON generation or API entry point, then verify that the response includes both requested icons with their complete definitions.