(English is not my first language, so I am sorry if there are any mistakes)

When joining instances with lots of people in it, an error always occur when connecting to the instance. There is nothing wrong with my internet, and I can join normally if I make a new instance. If I am already in the instance and then the player count increases, no issues occur. It only happens when I try to (re)join an instance.

There also is a rare chance that this happens on an instance with few people.