Post Redirects to Homepage

Hi,
I faced a strange problem recently. My website’s new posts redirect to homepage.
I upgraded wordpress to the newest version. Didn’t solve the problem.
Also deactivated all the plugins. The same.
Here’s the link:
???? ??????? ??????????
I checked my .htaccess. Here’s the whole thing:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

RewriteEngine On
RewriteCond %{REQUEST_URI} !(\.js|\.css|\.jpeg|\.jpg|\.png)$ [NC]
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ https://www.%{HTTP_HOST}/$1 [R=301,L]

# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript

# Or, compress certain file types by extension:
<files *.html>
SetOutputFilter DEFLATE
</files>

<ifModule mod_headers.c>
Header set Connection keep-alive
</ifModule>

<IfModule mod_expires.c>
# Enable expirations
ExpiresActive On
# Default directive
ExpiresDefault "access plus 1 month"
# My favicon
ExpiresByType image/x-icon "access plus 1 year"
# Images
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
# CSS
ExpiresByType text/css "access 1 month"
# Javascript
ExpiresByType application/javascript "access plus 1 year"
</IfModule>

The weird thing about it is that the older posts or the pages don’t redirect.

Here’s the link to blog posts:
https://www.dentalhome.ir/%D9%85%D9%82%D8%A7%D9%84%D8%A7%D8%AA-%D8%AA%D8%AC%D9%87%DB%8C%D8%B2%D8%A7%D8%AA-%D8%AF%D9%86%D8%AF%D8%A7%D9%86%D9%BE%D8%B2%D8%B4%DA%A9%DB%8C/
(Sorry, the links contain Farsi letters; that’s why they are encoded.)

Also I added some more posts. They all redirect to homepage.
What could be the issue?