Hey @lifehackergr
I believe I sent you the answer in our support center as this message is almost identical as the one we received.
Anyway, I am sending the answer here as well.
This is caused by the lack of CSS rules for picture elements. While your theme covers img tags properly, there are missing CSS rules that would assure compatibility with code changes Imagify makes in your HTML code.
It would be ideal to contact your theme provider and ask them to check this in more detail, as it would be great improvement for their theme to make full compatibility for using picture tags.
The quick solution is to turn off WebP display option, clear the cache and check if it fixed the problem.
If you don’t use CDN/Cloudflare, or some sort of server caching (NGINX cache, Varnish), you can use rewrite rules method to deliver WebP, as it would not produce this kind of issues.
Let me know if you need any further assistance, I am happy to help.
Best Regards
Marko
