EDIT, and for future reference for anyone else with this issue: This has got to be a preset sync issue. I think once you run the game that preset sync gives you you need to move the folders to your original fh folder then delete the extra fh folder than installs within your original one. Seemed to solve the problem for me and I assume the preset sync probably still works.Ok I promise y'all I'm not a hypochondriac. x'D But for some reason in map maker all the stuff shows up, but in the exported map a bunch of stuff isn't there.
I really don't understand this issue because the stuff was there earlier but this time it's gone, like glitched out or something? The only thing I can think is that both me and another user who got preset sync have this issue (I just got it today) but that can't be it. I re-exported the maps and fixed the download links and apparently that didn't fix it. As far as I know I didn't accidentally save new objects to the game's original object groups either.
Earlier
https://ibb.co/kfqWYQNow
https://ibb.co/cEYPnkAlso
https://ibb.co/k76ASkMaybe this is it? I saved extra copies of these with a different rock texture to match every rock-type thing in the map. Wasn't an issue earlier though. Neither are the retextured trees/branch corals since those aren't even what is disappearing.