Whenever you try to join a LAN world It says “the host connection has been lost"

Whenever you try to join a LAN world It says “the host connection has been lost check your Internet and try joining again” or something like that, when you check the internet it is strong, but like if your sibling is hosting the world and they are right next to you, you can see their screen and they are STILL hosting, you try again and it still doesn’t work.

Please fix this.

I clicked send by mistake, don’t judge

Are there any resource packs or behavior packs applied to the world?