Steps to reproduce:
1. Open project "Networking.zip"
2. Build on WebGL and Windows or use builds inside the zip
3. Open PC build and press "~"(tilde) key to open console
4. Type in "Server.ws true" to start the server
5. Open WebGL build on 3-4 separate browsers
6. In each build type in Client.connect to connect to the server
7. In each build type Client.RunEchoTest to start the test so that every browser is running the test simultaneously

Expected: The sent information is received without hangups as it comes in
Actual: The echo messages get lagged out and hang up somewhere in the memory and are sent out in bursts

Reproduced on: 5.6.5p1, 2017.1.3f1, 2017.2.1p2, 2017.3.0p3, 2018.1.0b4

Notes: on 2018.1.0b4 the messages aren't hanging up as much, almost not, but are still delayed quite a bit compared to the PC builds

To see "Expected" result in step 4 write "Server.ws false" instead and in step 5 - Open multiple PC builds and continue like normal.
Attached videos to show off Expected and Actual