Mumble link: Inconsistent AvatarPosition updates

[ideka]

This issue has been independently found by multiple sources, and reported on discord as early as october 2021.

It seems that the AvatarPosition value is not updated as frequently as the others. This is easily tested by moving forward in a straight line, and observing that often, multiple Mumble ticks will report the exact same AvatarPosition (even though, say, CameraPosition will still have updated properly).

AvatarPosition seems to update at its own rate, independent of the game's framerate, which results in many more duplicate values when the game runs at higher framerates, which is also easily confirmed by limiting the game's framerate via the options menu.

Here's a short video from the discord post above that illustrates the issue.

And also, a graph that was posted later:

Edit: It seems to update every ~40 ms, more-or-less regardless of the game's framerate.
Edit 2: 40ms is an interesting number. My guess is this is related to the refresh rate? Since normal refresh rate is 25 times per second, or exactly every 40ms.