My gutter installers broke it with their ladder - the glass is very strong on the main surface plane, but if you bang it just right on an edge you can easily crack it. Apparently, it is common for the crew to break a tile or two if they are not careful when dragging their tether clips across the roof during install.
In case you are interested, there is more discussion of the break and the subsequent repair process in this thread:
Does anyone know any details about the process and/or costs for repairing or replacing broken solar glass tiles. I'm wondering how difficult it will be to fix future problems. Is anyone purchasing/storing excess tiles in advance (not sure if that is even possible). This is my first post -...
teslamotorsclub.com
You've definitely been patient! I ordered in July 2020 and got PTO in late December 2020, but knew it was going to be a long process.