This has happened to me a few times, enough so that I think I've narrowed it down: If you do a lot of changes with the architect desk and hit cancel, there's a chance you'll end up with ghost items that appear in the place they were moved to but the game treats them as not so. A game restart fixes it. In some cases you can still place other items on spots that appear empty but aren't actually, functionally deleting what was supposed to be there. had to replant some resin tap trees due to this bug as they were just outright deleted after this bug.
#Bug that causes ghost items after using architect desk
gleaming jay
light steppe
This has happened to me a few times, enough so that I think I've narrowed it dow...
heyas! the developers are gonna need a bit more information! Please follow the pinned post on bug reporting guidelines or check here! #1222877204233584722 message It has a template! Every bit of the information helps the developers out in fixing the issue! Please note that the use of mods or any type of file alteration will result in the developers not being able to assist you!
marble plinth
Hi @gleaming jay! Thanks a lot for bringing this to our attention. 🙌
To help us look into this further, could you let us know which platform you’re playing on?
Also, if you’re able to share any additional details following the reporting guideline VixiaChick posted above, that would be super helpful for the team as well.
Thanks again for taking the time to report this! 
gleaming jay
Steam, win11 x86, whatever the latest version is.
I use a mix of a controller and keyboard since the game's input scheme is so bad, so that might be relevant
marble plinth
Steam, win11 x86, whatever the latest version is.
I use a mix of a controller ...
Thanks for the details!
If you happen to play again and can reproduce the issue, could you try to grab a short video of it?
Knowing the exact steps you take and seeing the “ghost items” you’re referring to would really help us understand the situation better. Thank you! 
gleaming jay
Turns out it's very easy to replicate. Seems like fences are primarily what doesn't revert, but seen it happen to grass and tiles/tilled soil too. If any of the item types that do not move back during a cancel are placed in a spot that another item correctly reverts back to, the un-reverted block becomes a ghost one. If it was moved into an actually empty spot it seems to be fine and can be interacted with. I imagine the other versions of this I've seen (items getting deleted etc) are further complications of the same underlying issue and that ensuring blocks actually do cancel back correctly will chain fix the entire series of issues.
Proof: https://jottacloud.com/s/411b7bb91f048e84f8689b257443b8d82f4
