Hollow Sirene Lag Issues

So basically I cant continue with the Hollow Sirene quest because when I try to spawn the bridge to kill the banshee my entire game freezes up, and by the time it starts running again the bridge is gone.

For reference, I usually get upwards of 90-110 fps on Minecraft. I'm currently playing as warrior and yes, I have tried to fly myself up into the opening using spells.

Any help on this is dearly appreciated :)

 

If you usually get 90-100 FPS, then it’s probably something wrong with the command blocks. I assume it’s like one of those issues that involves a random thing crashing the server. Like in the last update vines crashing the server was fixed. I’d contact a CMD about this.

 

I usually get 45 fps, but I had no lag whatsoever .-.

 

By freezes up, do you mean: 1. You couldn't move? or 2. You could move, but spells, hits, horse summoning etc wasn't working

 

I think freezing up as you can move but everything freezes. I havent experienced with my 98 archer but it happened 2 times to my mage while grinding in herb cave. All the mobs just froze and then I was just like wait what... And then everything crashed and I had to rejoin