In my pack of which I am the developer, World of Dragons, I have at least one player reporting that when using a blazing fishing rod that insane lag occurs and that an insane amount of items spawn from the water while it is being used dropping FPS to 1.

https://github.com/kreezxil/World-of-Dragons/issues/7

This occurs in his client and while connected to my server.

We're using FORGE build 2796.