Behavior of two sides in the mobile view

[HGF]

Hello, I need your help.
Please have a look to
https://mcwarrior.de/v2/pages_content/n_start_ext.php
(no username nor password required)
to compare pages "Home" and "Hall of Fame"
Resolution 1920x1080 with FF there are no problems. "Home" and "Hall of Fame" are working as expected. Background is stable, foreground is scrolling, menu bar is sticky and transparent.
The problem occurs with page "Home" when using a mobil device 320x600. Background is scrolling up, Menu bar (Hamburger) is scrolling.
Page "Hall of Fame" is working fine in mobile mode.
I compared settings ~1000 times but I cannot find a difference. I have no idea any more what's going wrong. Maybe you can help me!
By the way, the black and red design is required by the customer. Don't worry.

URL to wbs:
https://get.hidrive.com/QpWjPnkT


Thank you very much in advance.
HGF

[Pablo]

In my browser it seems to work correct.
What exactly do I need to do to see the issue?

Or maybe it's an issue with your browser cache?

[HGF]

Hi Pablo,
the issue occurs just on page "Home" on mobile device. In Firefox it is possible to simulate a mobile device by pressing "shift cntrl m". Customer setting 320x600.
Page "Hall of Fame" (to compare, is working fine.)
Cache is already cleared.

Screenshot of the issue
https://get.hidrive.com/6ZMKkpzi

[Pablo]

For me, the menu and background do not scroll in mobile mode.

I have tested in multiple browsers.

Page:
https://mcwarrior.de/v2/pages_content/n_start_ext.php

[crispy68]

Tested on my phone using Samsung browser, Firefox and Chrome and see no issues.

[HGF]

Hello,
I got it. On the affected page there was a hidden object out of the grids. This was preventing correct scrolling in some conditions.
Thank you all for your effort.
Regards HGF