Hello,
Sorry for the delay:
1. Slider you need to move all the CSS into the Theme Settings > Custom CSS.
2. You have installed the Wishlist plugin, so you need to disable WoodMart Wishlist: https://gyazo.com/7213c846b20c5f571f065bcc412fd6d5 and https://gyazo.com/9609d7c13a4bf63cc231cfec6bfcb9de
3. F) weird Chinese-like symbols in breadcrumbs bar (back, forward, …) — please provide page URL
When I enable product aviation in the Theme Settings > Product page, this symbol does not appear: https://gyazo.com/3d588c735011a385902abf5728eef5a1
4. left sidebar menu does not stay open eg https://stag.feenstaub.at/produktkategorie/babys/meilensteinkarten/ and is not clickable anymore —– please provide the page URL
and
H) Hover styles changed in the product gallery — please provide the page URL.
I have deactivated all the plugins not related to the theme and checked: the sidebar and hover effect:
https://gyazo.com/bd6dd79a55b981c8b9f8af256c45e256 and https://gyazo.com/2bcddb77913726a374ab6bc3def61e56
As you can see everything works. Most likely there is a plugin conflict. Please enable the plugins one by one to detect which one causes the problem.
When you update the theme, all the plugins should be also updated. In addition, you have the child theme customization. The customization could be effective for the previous versions at the same time, the updated theme may conflict.
We would recommend checking the plugins and detecting if there is a conflict. Then copy all the customization from functions.php of the child theme into a separate file, then add snippet by snippet and check which one causes the problem.
When the site has few plugins and no customization update almost never causes any break. In most cases, a lot of plugins and customization lead to problems after the update.
If you have any questions please feel free to contact us.
Best Regards
.
