Originally posted by Manwith Noname:

Heh, ok, next one. Is this on a dedicated server or are you just playing the game locally?

I also searched a bit and found this...

https://valheimbugs.featureupvote.com/suggestions/159254/stone-structure-randomly-missing-pieces

Thanks for looking into it. I am playing locally.

It's a really ♥♥♥♥ feeling to see stuff collapse like after you spend lots of effort building it. I should really stop playing early access games.