PrimeNg p-dropdown component Space bar is not entering space to my input box

Question

I'm using

<div>
   <p-dropdown[options]="states" filterBy="name" 
  [formControl]="$any(formGroup).get('state')" optionLabel="name" 
  [editable]="true" 
  (onFilter)="customFilter($event)" placeholder="Select State"\>
   </p-dropdown>
</div> 

and I have used this

editable=true 

which means It will take input text in it so It is taking input but not taking space entered value eg: If I pass United and then press space it is not allowing me to use space bar.

Currently taking UnitedStates as input value I wanna make that input as United States [ make use of space bar of keyboard ]