Open any internal window (efm, settings window, etc.) and it displays then stops updating after about a second or less. I've seen this on rpi, nouveau and intel drivers. it's pretty universal.
Latest E git should have this resolved, and I'm unable to cause a render freeze anymore. Maybe a screenshot of a frozen state will help...
The fix went into the E repository, not EFL - have you rebuilt enlightenment?
This bug should only affect our wayland compositor, you are running that? (I ask because it's a pretty non-standard configuration...)