ionic page data does not update

So say i have page one:

This page contains multiple variables and a constructor. it could look something like this:

export class TestPage  {

    testInt: number;
    testString: string;
    constructor(private someService: SomeService) {
        this.testInt = someService.getInt();
        this.testString = someService.getLongText();
    }

}

Now when this page loads it correctly sets the values.

Now say that I change page and on this page, I change some of the values in the service.

When I then come pack to this TestPage it hasn’t updated the values.

Does this have something to do with caching? or with push state?

How can I make sure that the page is “reloaded” ?

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