I had this a while back, faint clicking sound from rear. Changed with speed as described. Finally noticed a small oil leak on rear passages side. Ended up being damaged rear drive unit. They ended up replacing it and it resolved the clicking noise also. Take it in to service. Added picture...
Yes, I have the same issue occasionally. I lock the truck after arriving home but it will remain in a ready state. Lights on, screens on, audio on. I have had it stay in this state for multiple hours. The only real workaround when it happens it to drive it for a few minutes. It then seems to fix...