During weapons testing, I found this interesting bug along with the GIF recording being cut short, which is posted as a separate bug.
When struck by cannon fire, blocks with orientation become rotated. This does not occur for beams or missiles as far as I could tell.
tested so far:
All hulls, including Slabs
All weapon modules
Thrusters
Jump/inhibitor
Weapon computers
cameras
rails/dockers
All of which default upon being struck.