Sudden Teleport

I used a lead to tie it on 5 iron golems with speed and jump boost effect level 10 and 5 respectively. I took 'em to riverside and started killing all of them with command: /attribute BorealTester946 minecraft:generic.attack_damage 100 to increase my punching damage. However, after killing 4 of them remaining the last one, I punched the last one but it just teleported to my world spawn and when I press F3, I found out that the X Y Z part has disappeared in which I don't know my location. I can still do everything available in minecraft Java Edition but my attribute and my effects wore off by itself, it just disappeares. I can still type those commands and get it another time. There was no other people in my world not even Herobrine.

And by the way, I pressed every button in Singleplayer > Create New World > Game rules | and also I added a zero to every number in those boxes.

I tried to quit to title and go back in but the X Y Z still doesn't appears.