I do find this as well, my code (identifiers) stays red even if I save it and it compiles (test compile on save). I'm pretty sure it's pasted code anyways. I might still have a project open with it. If I find one I'll take a window shot and post it. (Using phone atm)
EDIT: Just out of curiosity I closed it and reopened and the red code is gone now. Otherwise even after running the app it still wouldn't update.