Experiments are loaded twice

[ptaillandier]

Describe the bug
When loading a game, the middleware launch a first time the simulation; then a second time.

To Reproduce
Steps to reproduce the behavior:

1. Run the game "Simple Toolchain/Demos/Multi-player game" from the middleware
2. Connect a player (Scene "Scene/Multi Player Game/Main Scene" from the toolchain template)
3. When the middleware detects the new player, it launches the GAMA simulation
4. But it launches it a second time just after

[GuillaumeLeroy34]

Should be fixed

[ptaillandier]

I tested it with the "dev" branch, and I still have the issue. However, if I click on "No" (when GAMA proposes to reload the experiment), the game is working.

[ptaillandier]

Actually, it’s a bit more complex than that: it does happen sometimes, but not systematically, and I haven’t yet figured out exactly when it happens.

[GuillaumeLeroy34]

Tied to issue project-SIMPLE/simple.webplatform#114 of the toolchain, this problem is most likely caused by a simulation already running on the gama server before trying to start a new one using the web platform. See proposed solution in the comments

[RoiArthurB]

Issue fixed on the branch dev and, as detailed, was caused by this commit 737b6ee

Basically, the platform was sending 2 times the command to start the experiment in a chain function; so it was happening a bit randomly mainly as it was only caused if the simulation was fully started in GAMA (otherwise, the second load command was silently dropped by GAMA).