От куда берётся второй редирект в битрикс?
Сайт на Битрксе.
Стоит редирект с "без слеша" на "слеш".
При заходе на "без слеша" - происходит два последовательных редиректа.

Содержимое файла .htaccess
Options -Indexes
ErrorDocument 404 /404.php
<IfModule mod_php5.c>
php_flag session.use_trans_sid off
#php_value display_errors 1
#php_value mbstring.internal_encoding UTF-8
php_value opcache.revalidate_freq 0
php_value mbstring.func_overload 0
php_value default_charset windows-1251
</IfModule>
<IfModule mod_php7.c>
php_flag session.use_trans_sid off
#php_value display_errors 1
#php_value mbstring.internal_encoding UTF-8
php_value opcache.revalidate_freq 0
php_value mbstring.func_overload 0
php_value default_charset windows-1251
</IfModule>
<IfModule mod_rewrite.c>
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ https://%1/$1 [L,R=301]
RewriteCond %{THE_REQUEST} ^.*/index.php
RewriteCond %{QUERY_STRING} ^$
RewriteRule ^(.*)index\.php$ https://%{HTTP_HOST}/$1 [R=301,L]
RewriteCond %{REQUEST_URI} ^/product/[^/]*\.html [NC]
RewriteRule ^(.+)/$ /$1 [R=301,L]
RewriteCond %{REQUEST_URI} !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} !\/$
RewriteRule ^(.*[^\/])$ /$1/ [R=301,L]
RewriteCond %{THE_REQUEST} //
RewriteRule .* /$0 [R=301,L]
RewriteCond expr "tolower(%{REQUEST_URI}) =~ /(.+)/"
RewriteRule [A-Z] %1 [R=301,L]
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
Options +FollowSymLinks
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !/bitrix/urlrewrite.php$
RewriteRule ^(.*)$ /bitrix/urlrewrite.php [L]
RewriteRule .* - [E=REMOTE_USER:%{HTTP:Authorization}]
</IfModule>
<IfModule mod_security.c>
SecFilterEngine Off
SecFilterScanPOST Off
</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>
#https content only
Header always set Content-Security-Policy "upgrade-insecure-requests"