OK, I have a second site with your plugin. It seems the issue is NOT solved.
I tested in three browsers (latest versions). There is weird behavior in all of them. Here’s what I am experiencing now with 1.4.1.
1. Firefox :
When loading the page, the page content is pushed down. The header section appears above the page. I am not using negative margins.
When I start to scroll everything suddenly appears normal. The header section looks normal and loads over the page (transparant).
Until I reload the page… the header section again shows above the page content.
2. Safari
Here the header shows correctly, transparant like it should be.
But when I start to scroll the margin above the shrinked header is back. Like in the screenshot that I posted earlier. The problem returned with version 1.4.1. Clearing caches on server and browsers does not fix it anymore.
3. Chrome
Same issues as with Firefox.
When I use negative margins again for my page hero sections, the problem is solved in Firefox and Chrome. All fine again with the negative margins active.
But NOT in Safari. Here the margin above the shrinked header is always visible after scrolling (like in my screenshot)
I hope this helps to identify the problem. Thanks a lot for your help !
Live website : https://www.kapperludo.com