1 and 2 not working.
Can you help me understand what can possibly cause that problem? (I have no idea what sleepmargin actually is).
I've no idea what caused the problem, which is why I'm offering you a few different things to do to try and fix it - if an empty room project works fine then there is obviously something in your project which is corrupting / breaking during compile.
Creating a new project and importing everything sounds like a lot of work !
And I'm not sure why should it help, what in the project can cause that problem all of a sudden.
If creating a new project and importing the resources from your existing project sounds like too much work, then I don't know what to say other than you can't be too bothered about trying to find a way to fix the problem. It will take you 5mins, if that.
Check the forum, doing exactly this has fixed many problems before, just like rebooting a PC can often fix weird problems for seemingly no reason.
If you don't want to try it then fine, get in touch with helpdesk and see if they can help.
Everything works on stable version (although I need to use the EA because the project containing my spine sprites won't compile on stable.
So, everything
doesn't work work on stable version then, does it?
Which again points to the issue being somewhere in your project - which is why I suggested importing the resources from it into a fresh project.
Import everything at once and see if that works.
If not, try it again but only import the basics you would need to run/compile, then add things in one by one and keep re-compiling and testing to help narrow down whether you might have a corrupt object, a corrupt room, a corrupt script etc etc.
It's just advice / suggestions, try it or don't try it, your only other option is to get in touch with helpdesk and hopefully they can help out.