ngx-bootstrap: Daterangepicker problems when compiling (--prod)

Versions of ngx-bootstrap, Angular, and Bootstrap:

ngx-bootstrap: 5.6.0

Angular: 8.2.14

Bootstrap: 3.4.1

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I’m trying to compile the project and I get an error on the console, the error is in the Daterangepicker component.

I noticed that the error is in the json file (ngx-bootstrap-datepicker.metadata.json) that is imported into the project.

There are no references to:

• chosenRange
• setRangeOnCalendar

Here (ngx-bootstrap-datepicker.metadata.json):

<div class=\"bs-datepicker-custom-range\" *ngIf=\"customRanges?.length > 0\">\n    
           <bs-custom-date-view \n      [selectedRange]=\"chosenRange\" \n      [ranges]=\"customRanges\"\n      (onSelect)=\"setRangeOnCalendar($event)\">\n    
           </bs-custom-date-view>
</div>

The error happens only in --prod.

Thanks in advance. Hugs