Connections doesn't work in split scenes

[_Aka_]

I really don't see any benefit of having a global manager just to store connections.

The global manager stores other things too (mainly pooling related data/objects). The connections being stored there was not a good decision. At that time less than now, since additive scene loading was not a thing in Unity.

Changing how connections work brings benefits, but two main downsides:

• It will probably break old projects.
  
• It will take a considerable amount of time to implement.
  

For now, I see that the benefits do not outweigh the downsides yet. As long as I can find workarounds, I prefer to not rebuild the connections system.

If I can't find a workaround for your repro case, this will be a strong argument in favor of rebuilding the connections system.