my friend and i were playing in my world, and he found huge holes that spanned the world.

my friend and I were playing in my world. We were ready to go to Woodland Mansion. at the beginning of the path, i remembered that i had forgotten something and told my friend to continue on the path that i would reach him later. I took what I needed and went back to walking within my friend's reach. Meanwhile, he kept walking until he found a huge hole that crossed the world. I asked him to stay there and wait for me, but there was another hole nearby and he didn't see it. He fell out of the world and lost all the items. I hope you mend this bug, because my friend has found these holes in my world for some time, from the latest versions. Apparently only he can see and fall into the hole, because the mobs pass through this hole as if he had nothing, and I've never been to my friend when he found those holes, but I have never seen any of these holes in my world in my vision.