Unfortunately there isn't too much to do about that. It just depends on how the browser reacts to a button with child buttons.
E.g I don't have this issue in neither Safari or Chrome but I have it in Firefox mobile browser.
We don't know if there's a possible fix as the third level button is just a snippet of code we found from a third party developer.
Anyway, just inside the button you can find the subsections so I don't really see it as a huge bug considering only happens under certain OS circumstances.
It might be fixable so I'll take note of it.
E.g I don't have this issue in neither Safari or Chrome but I have it in Firefox mobile browser.
We don't know if there's a possible fix as the third level button is just a snippet of code we found from a third party developer.
Anyway, just inside the button you can find the subsections so I don't really see it as a huge bug considering only happens under certain OS circumstances.
It might be fixable so I'll take note of it.