This might be a desync issue where the server isn’t able to register the action.
Were you still able to interact with those placeables and building pieces at all? (see inventory etc.)
Make sure to check your decay timers and if possible Event Log (ESC) for stability issues.
You can use imgur.com links (the bit behind
imgur.com/) to post images until you meet the requirements for uploading images (read 5 different posts, 30 different messages, and spend 10 minutes logged in. This is to prevent automated spam.)
Information about how tech works has to reach players by word of mouth (and books about programming). If you don’t know what all the buzzwords mean, it’s understandable.
Servers have to restart to avoid things like desync, crashes and losing your progress due to memory constraints in general. This is also part of why there’s a decay system, (big) builds cause strain on the server.
I am personally not server tech savvy. Correct me if I’m wrong.