Yii random string in url redirects to page not found

ON my Yii framework website migrating on 1and1 hosting… when we click on view product details there are random alphanumeric characters being added in url and therefore it goes to 404 page not found… screenshot attached https://snag.gy/18eKYs.jpg

my htaccess code as below

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php

I just checked, the same website is working fine on HostGator without any changes and there are no characters in that particular url… so I suppose it is a redirect…

Please let me know what could be the problem