Dorodnic the RealSense SDK Manager has said: "The only side-effect of the projector overheating I am aware of is that the camera can decide to turn-off the laser (and continue to work based on ambient light)". He adds in a different discussion, "the camera is allowed to turn-off the emitter in an event of overheating or electrical failure", and "it can be an unlikely production flaw" in that particular camera.
I have never encountered a case where the "Laser hot ... disabled" message was triggered, which in itself indicates that your case of overheating is an unusual one that appears to go beyond normal heating-up of the projector
If you wish to return the camera for a replacement, the details for filing a returns claim can be found in the link below. The 40 Series cameras have a 30-day return policy and a 1-year warranty.