While out exterminating biters in my tank, I noticed that the cannon would sometimes wait for a few seconds before firing a shot after I pressed space to shoot. After investigating why this was I noticed that the cannon doesn't automatically aim at the mouse all the time. Instead returns to pointing ...

I was blue printing my walkway when I noticed that there was landfill in the blueprint even though I didn't fill in water here. Possible remnant from map gen? In any case I'm fairly sure this is a bug.

https://steamuserimages-a.akamaihd.net/ugc/1000268107208049752 ...

This is an option you can enable or disable in settings. It does not sound like a bug.