Thanks for your replys.
Okay, I switched back temporarily to Shapely (1.2.15), so that I can show it to you.
Latest version of Wordpress
PHP 8-1 or 8-2 (no difference)
Envira Gallery lite 1.8.5.2
Firefox 108.0.2 for Mac
Unfortunately the behaviour of the pages that have gallerys changes from time to time here, due to cleaning the browser cache I suppose.
So when you can see a gallery where none should be, please reload the page to see if it dissapears.
Most of the time it is like this:
https://sunsetglow.de/aktuell/
Gallery shows up for the blink of an eye and then dissappears/ is invisible, but the pictures can be displayed by clicking on them.
https://sunsetglow.de/webdesign/
Gallery shows up, but dissappears after a page reload.
https://sunsetglow.de/portfolio/
Gallery shows up on this page, but it dissapears after a page reload.
https://sunsetglow.de/portraets/
Gallery shows up on this page, but it dissapears after a page reload.
https://sunsetglow.de/awo-luebeck/
Gallery DOES show up and DOES NOT DISSAPPEAR after a page reload.
I think this is the only page with a gallery that works like it should.
When I switch to another theme the problems are gone and all my gallerys are displayed properly.
I already contacted the support of Envira Gallery and I was told to deactivate the option „lazy loading“ in the settings, what I did in every of my gallerys. But it had no effect.
Here is my thread over at ENVIRAS:
The problem was declared Resolved when I reported, that after switching to any other theme, everything worked well.
Any help is appreciated
Thanks
Nagra