It shows available while it is taken[BUG]

Some times heroku app responses 404 error. 

Suppose I want to find out about ABC repo.

I type ABC, 

req sent to server - A, AB, ABC.

AB and ABC response are quick. ABC returns detail which means repo name is taken. 

But server responses 404 for "A" after it sends ABC details.

ABC will turn UI to name taken but within milliseconds, 404 for A turns it to name is available.
