If there are too many entities in the world then something's start to not function

As said in the title, If there are too many entities in the world then something's start to not function
Example: I was playing the beta for the first time (1.16.230.52) and wanted to test the fact that if you have oxidised copper or lower then it goes back a few stages to normal block of copper if a lightning rod nearby and is struck by lightning, but when I changed the weather to thunderstorm suddenly, breaking a block will not bring any particles, Skulk Sensors don't react or 'produce' vibrations and most of all you can't open inventory for a long time and you can't change the weather for a while also the pointer glitches, please fix this because it will make a great improvement to the game performance.