Где искать проблему?

php_value mbstring.internal_encoding UTF-8
php_value default_charset utf-8
php_value opcache.revalidate_freq 0
php_value max_input_vars 10000
php_value default_socket_timeout 60
Options -Indexes 
ErrorDocument 404 /404.php

<IfModule mod_php5.c>
  php_flag session.use_trans_sid off
  #php_flag default_charset UTF-8
  #php_value display_errors 1
</IfModule>

<IfModule mod_php7.c>
  php_flag session.use_trans_sid off
  #php_flag default_charset UTF-8
  #php_value display_errors 1
</IfModule>

<IfModule mod_rewrite.c>
  Options +FollowSymLinks
  RewriteEngine On

RewriteCond %{HTTP_HOST} ^www.тест.рф$ [NC]
RewriteRule ^(.*)$ http://тест.рф/$1 [R=301,L]

#редирект с /index.php
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /index\.php\ HTTP/
RewriteRule ^index\.php$ http://тест.рф/ [R=301,L]

#редирект с внутренних /index.php
RewriteCond %{REQUEST_URI} ^/index.php/(.*)$
RewriteRule (index.php)/(.*) http://тест.рф/$2 [R=permanent,L]


#убирает /index.php в конце алиаса
RewriteRule ^(.*)index\.php$ $1 [R=301,L]

RewriteCond %{REQUEST_URI} ^(.*/[^/\.]+)$
 RewriteRule ^(.*)$ http://%{HTTP_HOST}/$1/ [R=301,L]

  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-l
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
  RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
  RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]
</IfModule>

<IfModule mod_dir.c>
  DirectoryIndex index.php index.html
</IfModule>

<IfModule mod_expires.c>
  ExpiresActive on
  ExpiresByType image/jpeg "access plus 3 day"
  ExpiresByType image/gif "access plus 3 day"
  ExpiresByType image/png "access plus 3 day"
  ExpiresByType text/css "access plus 3 day"
  ExpiresByType application/javascript "access plus 3 day"  
</IfModule>