There is a bug that fixes all players within a certain range

Suddenly from 5/11, when entering a certain range (part of the base),
All players who entered had FPS value 100 or more
It drops to 1 at a stretch and hardens. When it is terrible, it is dropped from the server.

I did not create something that would make the server heavy,
It worked normally until 5/10.

Outside of that range everyone works fine, even while someone is solidifying within that range,
Players outside the range will move normally.

I used the command to take the player out of range and respond,
The scope is quite wide, and I am very troubled when most of the bases can not be used.

I do not know the cause and solution at all from here,
I think that the server has been broken
I have made an inquiry.

By the way I use Realms.

Thank you for your response.