lag peaks when changing chunks

Lag peaks are still not solved when changing chunks, more specific in the next videos.

 This world was created in 1.7.10 and updated consecutively, since 1.14.4 presents these problems.

1.14.4 => https://youtu.be/op-X7WO4RQ0

 

1.15 pre-release 3 => https://www.youtube.com/watch?v=3kQnqypozKE&feature=youtu.be