Reproduction steps:
1. Open the attached project
2. Open scene "offline"
3. Play
4. Click the "Connect" button
5. Notice that there was no error registered even though it failed to connect

Expected result: OnClientError should register the error of connection timeout

Actual result: OnClientError() does not throw an error when connection times out

reproduced on: 5.4.0b13, 5.3.4p2, 5.2.4f1, 5.1.4f1