self.onDataUpdated = function() {           
    let defaulthttpconfig={
        ignoreLoading:false,
        ignoreErrors:false,
        resendRequest:false
    customerId={entityType:'CUSTOMER',id:self.ctx.currentUser.customerId};
    let pl = new self.ctx.pageLink(100,0,null,null);
    const uu='/api/alarm/DEVICE/';
    const bb='?pageSize=100&page=0';
   // nested subscriptions
   const outer$=deviceService.getUserDevices(pl,'MYProfile',defaulthttpconfig);
   outer$.pipe(
        self.ctx.rxjs.switchMap( data => {
            //return self.ctx.rxjs.of(data); // <-- no refresh triggered 
            return http.get(uu+data.data[0].id.id+bb,defaulthttpconfig);  // <--refresh triggered
    ).subscribe(console.log,console.error); 
Surprisingly, this nested subscription triggers a refresh of the widget as seen in the following gif:

This refresh propagates into the widget-types view which makes it hard to add new widgets because the edit-menu is refreshed every couple of seconds. See the next gif.

Is there any way to prevent this behavior?
Environment
OS:  Win 10
ThingsBoard: PE 3.3.1
Browser: Chrome