Players and vehicles controlled by players being far or very far away are showing some really wierd issues.
When you look at them through e.g. tank optics, they show all those named issue: Glitching around, porting dozens of meters all around the place every few seconds, clipping into objects or the ground, 'lagging' and 'desyncing' so bad you usually have a hard time trying to hit them.
I first thought these issues are related to lags/desyncs by either clients or the server, but observing this issue for months now it seems it's happening on a common basis.
These issues occur really often and the further away the other player or his vehicles is moving, the worse it gets.
It's also happening on servers which I know for sure are running really well and smooth and even if the other player and I have a latency of <30 ms and there is no evidence for any desync of both.
It usually start happening at distances greater than approx. 1500m and it's getting worse with increasing distance, being pretty bad at e.g. 2500m.