Unfortunately, the long wheelbase Coaches (like my 42ft Beaver) will crack the windshield if the Coach goes out of level. Mine did twice now (and I had the glass installed by the company listed above with a new gasket after the first cracking).
This time I just had the Coach parked at my home (did not use it at all in 2020 due to the COVID thing). I left it in auto-level mode (air leveling), then months later noticed it was slightly dipping at the front left - which is when I noticed the glass had cracked in the corner.
The auto leveling did not do its thing (it is plugged in to shore power) and the HWH air compressor should have kicked on to keep the air bags full - but something didn't work.
Maybe I should dump all the air and just let it sit at its lowest while parked for storage next time.