Select doesn't respond to interaction when inside tab page

Ionic Framework ionic-v3
1

I have a page with some <ion-input>'s and an <ion-select>. Everything responds as expected when the app.html template is as plain as this:

<ion-nav [root]="rootPage"></ion-nav>

However, when replacing that with

<ion-tabs  id="tabs">
      <ion-tab [root]="rootPage"></ion-tab>
</ion-tabs>

for a tabbed layout, the select no longer responds to user interaction. The inputs on the page still work fine though. I was wondering if I stumbled on an issue here, or am I missing something? I am (still) using beta3.