ScrollTrigger calculates wrong pin-spacer height when user agent type is mobile

[Kholja]

I got this example from the forum. It works, however if you export the sample, open chrome developer tools and switch to "Responsive" in the device toolbar, the height of the pin-spacer is calculated wrong. I.e. 3800px instead of 7400 in a window size of 1200x800. The wrong calculation happens as soon you choose a device with user agent type "mobile".

Why does this happen and what can I do to make it work?

See the Pen wvoNzQG by kholja (@kholja) on CodePen.

[OSUblake]

Is there a problem on mobile? That tool is just an emulator and shouldn't be used for actual testing.

 

[Kholja]

At least Chrome on the iPhone let's me scroll through all panels, which was not possible on the emulator. There are some weird bugs but they are probably more CSS-related. I'm gonna do some modifications of the example and let you guys know the results.