Interesting idea. I had not washed the windows for some time, since the RV was being stored in an area without water. I did have this happen in an office building I had. It had very darkly tinted windows that occasionally shattered in direct afternoon sun. These windows aren't that dark, but I'm stumped.
2015 38RL with MORryde IS, residential fridge, DW, washer and dryer, generator, and slide in slide. 2 A/C, 1 HP and a fireplace. Added 17.5 inch wheels. Follows a 2013 Ram dually diesel with 8' bed and Reese 20K.