2019.1 has vsync bug?

Hello, I am working on my own network solution and in the 2018.3. version had no problem. In the 2019 version the Build version has a small delay if vsync is turned on.

The client which I move (you will the that in the image bottom) is the right one. The client moves and send after the move his position to the server (which is a c# console server) and the server send the position to all other clients.

Here the image I made. Left side you see 2019.1 version and the green line shows where is vsync turned on and the red line where is vsync turned off


If I move now the client and it if the server send the position of the client to all other clients clients will update almost immediately but not the 2019 version with vsync turned on.



I am not sure if this a bug or I need to tweak settings but as you see in the image the problem comes only at on the build version with vsync turned on.