interval and timer Javascript does cause circular reference error

[Subnum12]

The JavaScript translation for interval (for timer it's same behavior) causes this error.

I just added this interval and did send messages with true/false payload. After some seconds I get this error:

"Context 5349578a099cecbb:434ba4f022dce874 contains a circular reference that cannot be persisted"

I do get same error using function block with corresponding JavaScript.

if (context.get("interval_1")) {
  clearInterval(context.get("interval_1"));
}
var interval_1 = setInterval(function() {
}, 1000);
context.set("interval_1", interval_1);

That's how the JavaScript should look like not causing any error:

//does not need to be checked if exists.
clearInterval(context.interval_1);

var context.interval_1 = setInterval(function() {
}, 1000);

I do not know if this is relevant, but my context store (settings.js) is defined like this:

contextStorage: {
         default: {
             module:"localfilesystem"
         },
			memory: {
             module:"memory"
         }
     },		

[Subnum12]

Feature request:

You maybe also add to Config node a setting to select the context store as noted here: https://nodered.org/docs/user-guide/context#using-context-in-a-flow