After a random period of time, some users send and receive times become exactly the same, with the total network travel time seemingly being 0.

In the attached screenshot, all relevant data is on right side. Serialization Time is result.receiveTime - result.sendTime, Send Time directly reads result.sendTime, Receive Time directly reads result.receiveTime, and Time since startup reads Time.realtimeSinceStartup

Here is the world where the issue was discovered: https://vrchat.com/home/world/wrld_7fd1ba0f-4d07-4a6f-b984-e48a6d6cc7ad

When entering the world, enable debug panel and hit start, and over time keep track of other players serialization data.