Why is the classic dark theme so laggy?

[Centurion Hunter]

Idk if its just for me but it feels like it loads like shit via this theme
Any fellow classic users have the same exp?

 

[estonianslayerr]

Just you, restart your .org or try later.

I've had it be really giga slow on here before, just had to wait a lil for the servers to sort out or smth idk.