Blocks missing in School causing lag (?)

[Dashy_xo]

(Edit: It's fixed now but I'm still wondering what it was) I'm not sure if this is where this kind of stuff goes but I'm gonna try- So there's missing blocks on the map causing lag plus someone is just running around shooting fireworks (I think I'm hearing the sound for fireworks) and that alone is causing a bunch of lag

 

[Blazehh]

Was this during the event?

 

[Elteragxo]

(Edit: It's fixed now but I'm still wondering what it was) I'm not sure if this is where this kind of stuff goes but I'm gonna try- So there's missing blocks on the map causing lag plus someone is just running around shooting fireworks (I think I'm hearing the sound for fireworks) and that alone is causing a bunch of lag

I suggest rebooting, and using a mod to improve performance. BetterFPS and Optifine are the best two.