World would lag when i'm playing alone, Friends connect to my world, and Having trouble getting in Minevile Sever

Good Evening I would like to report this after it keep occurring. When on one of my world i was building a camp and the blocks wouldn't appear and but the game would still act like i placed or removed blocks while it looked like nothing had changed. Next A friends of mine had trouble joining a world i was on I tried inviting but it still didn't work we even restarted our games just to sure and still nothing would work i don't know why but it's hard to connect to friends who play on mobile it either stop and say connection timed out or just wouldn't let me connect this happening long awhile it kinda ruin the day for them and me so i hope if this get fixed pretty soon. And Finally Yesterday i was trying to join the Mineville sever and it would keep disconnecting me and when i would join and not disconnect it won't let me do anything i don't know why this started but i would appreciate it if get solved thank you.