Bed Texture Error?

So in Minecraft, I was heading to bed for the night, and I switched to my web browser to finish a youtube video. When I flipped back an unpaused, the time had switched to daytime and I was awake.... and part of the bed texture seemed... off. If it was like that before sleeping, I didn't see it. And it's only glitched on the right side. Restarting Minecraft didn't seem to help, so I can assume its been there longer than I realized. When I searched, I didn't see this reported yet, so i felt I should speak up.