Website comes up as soon as I start typing

I have an application in Node/Express that is exhibiting some strange (to me, at least) behavior. I am not sure why this happens, but as soon as I begin typing in the URL, the web page instantly comes up. All the logs start populating data and I have my home screen. This is on a local instance for now as I'm still trying to work out bugs related here. I believe these two may be inter-related, but I can't find any data online; perhaps I'm using the wrong search terms, but the long and the short of it is this:

I'm connected to a VM (CentOS7) and everything is run through AWS. I type in my IP:PORT (e.g. 12.34.56.78:9999). As SOON as I type the '1' in the URL, all the logs fire, running through all the scripts. Since I'm at my home page, I hit 'Enter' and is SUPPOSED to go through a redirect to an authorization page (e.g. 12.34.56.78:9999/auth). At that point we're running into my original post, identified above, but this question is simply an attempt to understand why my web page is being shown before I ever 'finish' the call by hitting the 'Enter' key. Is this normal behavior when an application is being accessed locally?