After wordpress 5.6 update Firefox not showing all background pictures of the site

[zskeresztes]

Hello,

After I updated my Webpage to WordPress 5.6 my site is working my with all Browsers (Edge, Chrome, etc.) but not working with Firefox Desktop.
Firefox is now not showing all background pictures of my subsite.
When I press Ctrl+Shift+K to check the reason the pictures are appearing automatically.
Normally it should be appearing automatically in the same way as it is happing with other Browsers.
Here is an example of one of the subsites ​https://www.advilcom.ro/en/despre-noi/, It should be a picture in the area where the big About Us text is writen in the middle of the page.

Can you help me how to solve this problem ?

Thank you!

Best regards,
Zsolt

[zskeresztes]

Example how Firefox is showing the Webpage

[zskeresztes]

Example how other Browsers are showing the site (here Microsoft Edge), in this way should be ok.

[oglekler]

Hi! I have got this picture in Chrome and Firefox. If you still have this issue, try to update your theme (and plugins) and if this will not help ask your theme developer.

Please note that this Trac is used for enhancements and bug reporting for the WordPress core software, not for third-party plugins or themes, or individual support questions.

[mukesh27]

Hi and welcome to WordPress Trac! Thanks for the ticket.

I'm sorry to hear you are having issues with your website. Please note that this Trac is used for enhancements and bug reporting for the WordPress core software, not for individual support questions.

You are using Betheme premium theme so contact the theme author for more support on the issue. Otherwise, you could use the WordPress support forums: ​https://wordpress.org/support/forums/.

Feel free to reopen if it was a WordPress Core issue.