Why is there a redirect to the main page?

Question

htaccess

Created forum directory, put wordpress there and installed wpforo forum.
I wanted to remove www.londonjack.ru/forum - www from the link, returned everything back, but now from chrome there is a redirect to the parent directory. Firefox and the forum opens from the phone, what could be the problem?
.htaccess wordpress, which is in londonjack.ru/forum/

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

# END WordPress

.htaccess which is in londonjack.ru/

#Кодировка
AddDefaultCharset UTF-8
#Убераем html расширение в конце браузерной строки
RewriteEngine on
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /([^.]+)\.html\ HTTP
RewriteRule ^([^.]+)\.html$ http://londonjack.ru/$1 [R=301,L]
RewriteCond %{REQUEST_URI} !(\.[^./]+)$
RewriteCond %{REQUEST_fileNAME} !-d
RewriteCond %{REQUEST_fileNAME} !-f
RewriteRule (.*) /$1.html [L]
#Запрет выдачи листинга каталогов
Options -Indexes
#Страницы ошибок
ErrorDocument 403 /error403.html
ErrorDocument 404 /error404.html
#Убираем index’ное дополнение из URL главной страницы сайта.
RewriteRule ^index\.html$ http://www.londonjack.ru/ [R=301,L]

Answer 1

1. you have a redirect cache in your browser How to clear the redirect url cache?
2. you don't need to redirect, you need to change the DocumentRoot