The Bug: when I record a replay and later watch it back after some time weird chunk glitches appear, seemingly duplicating certain areas of chunks onto other chunks (see screenshot to know what I mean). Is there anything that could cause this and how would I fix it?
OS: Windows x64 bits
Forge: 1.8.9-11.15.1.1722
Java: Version 8 Update 221
Replay Mod Version: 1.8.9-2.2.0-b7
FFmpeg: latest version as of 13-9-2019 (date of post)
Other mods: none
What triggers the bug: over time when the replay has been playing for a little while the random blocks start appearing as seen on the screenshot, it happens on all replays
Screenshot: https://imgur.com/a/GZ3xqn0
It also happened when I had auto recording turned on, and still after i turned it off. Generally the issue always shows after some time, getting progesively worse over time (blocks randomly appear when your watching and dont go away). The issue "resets" when i join a new game, but slowly gets worse over time again. I also noticed these "chunk duplicates" only occur at empty chunks where there was only air when the game started (so the original map didnt have any blocks there), and in a grid as shown in the screenshot.
Link to mediafire download: http://www.mediafire.com/file/j423reaajr827y7/2019_09_13_21_34_40_0.mcpr/file and http://www.mediafire.com/folder/zavzcfz1iq86a/2019_09_13_21_34_40_0.mcpr.cache
Effects start to show at around 5:45 and get much worse around 6:15 - 6:45
(Btw I have no idea which files are important for the replay so I just put the link to the file and folder I found with the name of the replay)