PrimeNg Table method "dt.filter" doesn't filter character: "/"

Question

I have an input in the column header to filter data in my primeng table

<input pInputText type="text" (input)="dt.filter($event.target['value'], col.field, 'contains')" placeholder="Filtrar"/>

The column shows dates

{{fecha | date:'dd/MM/yyyy HH:mm'}}

It filters the numbers Ok

But when I enter "/" it doesnt work.

Is there any way to resolve that?

Thank you!