Header doesn't always cover the whole page (mobile, Android)

[Kabootle]

As already mentioned in the beta test topic, tables are sometimes displayed wider than the header. So far I noticed the issue on the tournament page but much worse, on the profile page as well.
Edit: lobby does the same

Apart from the visual confusion it makes the icons on the header really tiny, making it difficult to get out again.
(Android 7.1, chrome browser)

[efraimqe]

In fact, while editing profile on Android the browser switches to desktop mode.