Android Fullscreen doesn't work in portrait

[jwktje]

Running Expo Go on a physical Android device, the Fullscreen behaviour seems broken. When I press play inline, it all works well. When I then press fullscreen, it shows the player in a large white webview.

Here is the strange thing. When I minimize the app (as in; navigate away but don't kill Expo go) and come back, it shows correctly in a portrait fullscreen view. Also if I press the Android rotate button on the bottom right (which I don't know if all versions have) it works fine in landscape.

On iOS I also have no problems. So it really boils down to Android in Portrait upon first pressing the fullscreen button.

Check out this screenshot that shows my issue.

I really want to solve this. What can I do to get this issue resolved?