My game frequently disconnects clients when playing on a dedicated server

When playing on a steam dedicated server, all clients are much more likely to disconnect and often experience multiple disconnects per game. This happens at multiple tickrates (tried between 30 and 60), as well as when running on my own PC or on a VPS. I was getting disconnected often even while running it on my own PC. While running a listen server, none of this happens despite everyone having a higher ping.

My project is entirely blueprint and the only C++ is what was required to get a steam dedicated server built. Where would I begin to start solving this?