i have an ftb singleplayer world and everything was always fine until about a week ago when i got everything you would get from a massive amount of connection lag except that it's a singleplayer world. I didn't use any new items or mods. i tried backing up the world and re-installing ftb but it was a problem with the world (i tested other world after i did this and only that one didnt work). i tried disabling a bunch of mods i was using but it still doesn't work. if anyone knows what the problem is or how to fix it or even a guess please reply.