https://github.com/2004Scape/Server/blob/c94e61867be0914263c70bd965b230b9e96ea493/src/engine/script/handlers/ServerOps.ts#L320C1-L359C7
Instead of doing +100 on heights, they should be doing * 4
From OSRS client:

Compared to 2004scape (older) client:

This may or may not break projectiles in all cases, depends if RuneScript noobs used the correct values or not from RSProx/Event Inspector.