So, here's a tire question for y'all. Never seen this before. I noticed some road noise that was a little out of the ordinary, so I checked every single tire on my rig once I was docked at my delivery. All are good, and at the correct psi. All except one. Completely flat, zero psi. The tire is fairly new, and completely undamaged. Sidewalls and tread. It was fine this morning. Can a tire just lose its seal on the rim? If so, what would cause that? I don't recall any potholes that were especially severe, didn't curb it or run over anything. If anyone has any insight, I'd appreciate it.