Bot queue exploit inflating join queue to extremely high numbers, making joining our game nigh impossible

Hi, I’m the owner of a small RP game, Checho’s Deltarune RP. We are currently being attacked by some sort of new exploit in which large amounts of players, presumably bots, are filling the queue to join servers, preventing anybody from joining the server, and are seemingly staying in the queue indefinitely despite the server having more than enough capacity to let players in.

If you look at the server list, you will see many servers open which have just 2-7 players, but are otherwise impossible to join. Even trying to join a server that shows 2 players in it, results in a message saying there is a queue of 8 players. This issue is heavily affecting our player experience and has made it next to impossible for a full server to form, which is critical given the social nature of the experience. Any help would be appreciated.

This attack started at roughly 2025-04-10T15:30:00Z.

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Expected behavior

I expect the queue to work as intended, and not be filled up by bots. Typically, under normal circumstances, our game servers fill up to ~150 people in one server.

2 Likes

The queue seems to be working for myself. Looks fixed to me.,

We have since implemented mitigations for this, it will now teleport players who join into a temporary subplace. Players who are in the queue will never enter the sub-place.

These attacks have been intermittently reoccurring the past 3 days, usually around the same time (early day CST), causing disruptions for our players as we have to toggle on and off our mitigations.
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The issue seems resolved at the time. Attempted to join the game the player list is currently looking fine.

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