Okay, my server IP is 74.91.115.55:27015 and Gametracker is showing incorrect information.

It's showing massive drops in players which didn't happen and it's not correctly showing the amount of players that were in the server. For a few hours today there was well over 20 people, and it shows that it dropped for quite some time which it didn't. Occasionally there will be 1-2 second lag spikes due to a plugin I have that bans people for advertising (and the extensive log reports it produces that I want cause this - no complaints from players as it doesn't happen that often). Maybe gametracker is pinging my server when it lags for a second and thinks there is no players in there? I'm really not sure but the current graph that gets displayed does not correspond with how the server is really doing.

It is possible that there were connection issues somewhere between GT and your server, causing GT to be unable to scan your game server.

There may have also been a bug that prevented GT from scanning your server temporarily, since there were a couple bugs in the past couple days.

I see. I will keep an eye on it and report anything else. My old server was dropping to almost 1900 rank and I switched servers only to have a slow rank drop so it's a bit frustrating