explain the issue (including any pattern you noticed about when it happens); I've got a 79 Oak Tree forrest at the desert. Roughly 8 of them have turned into Green Rain Trees permanently.
full error text (if any); no
what OS you are using; PC Steam
in-game language; English
single-player or multiplayer; Mostly multiplayer
anything else you think might be relevant; I suspect that these trees were interacted with during the Green Rain event which might be why this was caused? Not 100% sure though. I presume the tappers vanished on the Oak trees,
if you experience a bug that isn't cosmetic, please upload your save file! You can get your save this way: https://stardewvalleywiki.com/Saves ; when I open the saves folders from this website, all the save files do not show up oddly.