What Sindre-Elias said isn't completely true, though thanks to his comment I found a new behavior.
When traveling more than one chunk away from the bugged chunk border, frame drops do not occur after one crossing. However, every subsequent crossing causes the frame drop bug.
Footage of this new behavior: https://www.youtube.com/watch?v=HXuN5M0fEo0
Is there anything else I should do to help? Or do I just kinda hang tight?
Commenting again to say I've edited the description with a link to the world: https://drive.google.com/file/d/1Jeur5KxOR-RIPLqB71wrV1g0cFDnzz3S/view?usp=sharing
I forgot to mention that restarting seems to temporarily fix the issue. Maybe another program causes this?
I've added a video with the bug in Vanilla. How do I get a mod to change the status?
I am also experiencing this bug.
Commenting to say that this issue was supposedly resolved in previous version 19w39a: MC-158672
Maybe another update rolled back whatever fix they had then?