When the URL is a redirected URL, the simulator doesn't follow the redirection. (ex vocab.com redirects to vocabulary.com)
When the URL is a redirected URL, the simulator doesn't follow the redirection. For example, vocab.com redirects to vocabulary.com. The simulator shows that VOCAB.COM is whitelisted, but when the student types in the URL, it's redirected to VOCABULARY.COM, which then gets blocked. The Admin needs to add the final destination, in this case, VOCABULARY.COM, to the whitelist. This just adds more downtime to everyone while the admin trys to troubleshoot why it's not working for the student.