TwentyTwenty-One: Parallax Effect not working after update to 1.11.3

First of all, thank you for this great plugin, which has accompanied me for many years and which I use on every one of my websites.

But now, I’m facing an issue with the parallax effect after update.

I guess, there is an issue with your plugin in connection with the TwentyTwety-One theme. After update from Version 1.10.0 to 1.11.3 the parallax effect is broken and there is a unexpected margin on the first AWB-section.

On the live page I reverted to 1.10.0 and the issue is gone.
Here you can compare how the parallax effect shoud be:
https://hohlaesthetics.de

I’m testing the update of our plugin on a dev-domain, where Version 1.11.3 is installed:
https://btnjoygn.myraidbox.de.

So far I have done the following:

1. Dactivated all plugins. The parallax-issue is still there.

2. I changed the Theme from TwentyTwenty-One to TwentyTwenty-Three: the issue was gone.

So, i suppose, there is a Problem related to TwentyTwenty-One.

Thank you for your support!

The page I need help with: [log in to see the link]