I kept realizing that any world I was going to play on after opening it will cause the frame rate to all of a sudden bother that world, simply by stopping for 1 second and then continue on for 2 seconds and then stopping for 1 second and then continue on for 2 seconds and then stopping for 1 second and then continue on for 2 seconds from time to time to time and time and time and time again and again and again like usual, which didn't show up right inside of the debug screen, no matter which world I was playing on, what it's supposed to be worth, and why it ends up keeping on bothering me over and over again by some means. You guys did NOT fix this bug whatsoever, and I've been waiting and waiting and waiting for the third pre-release of Minecraft 1.14.3 and it still didn't seems to come out after that wait.