Registration is a two transaction process: First, the 'commit' transaction, and second, the 'register' transaction. See Registration Steps.

Commit Transaction

Speeding up the the 'commit' transaction will cause issues with the registration process with the sped up transaction not being detected.

Solution: Clear the browser cache to reset and begin the registration process again.

Register & Other Transactions

Speeding up the 'register' transaction and others will not cause issues.