hi,

After updating to WordPress 5.6, 

Display child categories of selected category on the filter option no longer be displayed. 

Please help

hi,

thank you for reply !

I'm using version 6.6.0 and all plugins are installed. 

That problem arose after the WordPress update. Also, the issue only exists on pages that have been edited after the WordPress update. The top of the post block does not show the subcategory list. I will send you screenshots of subcategories showing up before update and not showing up after the update.       

page edited after updating WordPress

Unedited page

thank you

Thank you for reply ! 

It shows once. Often only the first time the page is opened. I just checked. Mozilla Edge and on the phone. Shown once. Then it doesn't work.  blocks on unedited pages (After updating WordPress)  run without any problems. 

Please open the link several times and check.

Thank you

UPDATE

I checked in several ways about not showing category filters in post blocks.

What I saw then was that the category does not show up after logging into WordPress. I checked on Edge, Chrome and Mozilla browsers. When I did not log in to WordPress, the category filters in the Edge and Chrome browsers showed up well, but not in Mozilla.

Then when I logged in, I opened the relevant page in another tab of the browser and checked that the category filters were not displayed. Also, the category filters do not show up when viewing the preview after editing.

The only effective method I have found so far is to log in and edit in a private window in the Edge browser and then use a separate window to scan the page after saving. Then it will show correctly with all the changes. But it doesn't show up in Mozilla at all.

The other day I was constantly editing the site. I'm pretty sure this issue started as soon as WordPress was updated.

Please help fix this.

Thank you