Originally posted by luponix:

option 1: backups
option 2: https://www.nexusmods.com/valheim/mods/415?tab=description (mod that modifies the heightmap instead of relying on the terrain modifier objects that i assume got reset here)

The game creates backups by default... come to learn its a 5 minute difference in time though.

And while your suggestion is great for new players who will read this post (unlikely), not sure how that helps someone who assumed the game was stable enough. And not even assumed, it was just natural to not think the game would hit back with an issue like this. Sure I expected some minor bugs like a mob stuck in the ground every 50 hours or so.

And honestly haven't experienced any single bugs until this one. The only glitch/bug I'd seen in 200 hours to this point, was a boar shifted into the ground for a few seconds.

Also that mod linked has a bunch of warnings on it. Out of principal alone I'd likely stray from it. Not to mention ideally the game should function without the need for it.

Yes, there are mods encouraged for quality of life (like auto fueling torches, planting grid, more build rotations, etc), but to need a mod to fix a game breaking bug is a whole other story.

A bug like this should be informed to the community and the devs. Not bandaged in a back alley word of mouth mod page.