Angular Language Service Pipe causes identifier not defined error

Question

Am I doing something wrong? Here is a simple for loop

*ngFor="let group of (groups | slice: 0:5)"
[id]="group.GroupNum"

When I do it this way i get Identifier 'GroupNum' is not defined. 'T' does not contain such a member

If I remove the pipe then the error goes away. I believe the error is just with the Angular Language Service (VS Code) as the code still works as I would expect and the Angular CLI does not give me any errors.

If someone could point me in the right direction I would appreciate it.

P.S. The interface for groups is defined and if I change it to any it still gives me the error.

Answer 1

*ngFor="let group of $any(groups | slice:0:5)"

$any will remove the error of "Object is unknow"

Answer 2

Removing the whitespace in the argument should work.

*ngFor="let group of (groups | slice:0:5)"