fix: only call registerDefaults when registry isn't init'ed

src/sdk.ts

@@ -33,10 +33,9 @@ export class Sdk {
   public protocols(): Registry {
     if (!this.registry) {
       this.registry = new Registry(this);
+      registerDefaults(this.registry!);
     }
 
-    registerDefaults(this.registry!);
-
     return this.registry!;
   }