Issue with url when using category in permalink

Hi,
I’m using permaling as: /%category%/%postname%/

URL result for categories are like this:
https://mywebsite.com/category/parent-category/sub-category/

If i change the “parent-category” slug in url it does not result in 404 error.

Example i can change the parent category in the browser to something like this:
https://mywebsite.com/category/blablabla/sub-category/

i still have the same category.

Is this normal?

Here is my htaccess:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP:X-Forwarded-Proto} !https
RewriteRule (.*) https://mywebsite.com/$1 [R=301,L]
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>