I’m not sure what you mean by Game Module, as different than what I wrote above about rebuilding just my game module / project all of the time, just by itself?
I rebuild just my game all the time and the editor and such are not getting rebuilt.
The focus of my tip above was not just rebuilding on keypress, it was about rebuilding only your game module and not the entire engine, that’s what BuildOnlyProject does 
I’d be happy to help out if I could follow the issue you are having better
**Perhaps I can say what I think you’re saying and you can correct my interpretation as needed
**
You are saying
- When we make changes to our game code in our C++ UE4 project,
- Using the Github version of the engine, then
- The entire engine gets rebuilt each time we make changes to our game code.
If that’s what you’re saying my tip above is the solution I used, BuildOnlyProject does not build the entire engine, just your game module.
Are you saying something different?
Rama
PS: I’m just trying to help out, hope my tone is clear