When walking from chunk 17 3 -18 and then south to chunk 17 3 -17 I get a very noticable freeze frame but only if I have my render distance set to 10 chunks. Any other render distance doesn't seem to create the bug. I could not recreate the bug by using the same seed in a new world so here is a Google Drive link to the world download: https://drive.google.com/drive/folders/14KwUwyRrLiDIEwOO1zDKI49U-CHvawry?usp=sharing 

I also left my options.txt in case it's different for anyone else

Edit: I just learned that this does not only apply to the 2 chunks I meantioned but applies to, what seems to me, all of the xx x -18 and south to xx x -17 chunks

Edit 2: Just tested it with an Elytra and the bug does not seem to occur when going at a fast enough speed

Edit 3: When going south from chunk xx x -19, through xx x -18 and into xx x -17 (the affected line of chunks) the freeze frame does not occur at all

Edit 4: Here is a video (Read Edit 5 before watching video) https://youtu.be/jpNCfz-wMJo

Edit 5: I failed to mention that I did recreate this bug in a VANILLA environment before submitting the bug. I tried it in both 1.16.4 and 1.16.5 using vanilla. I only recorded the video using OptiFine but the bug is NOT because of OptiFine since I tested it

Edit 6: One thing I might add is that this does NOT happen when going north through the same chunk border