i have a tree, that lookes like it won't be saved as removed.
i removed him with the chainsaw and with the nobelisk.
if i reload the game, mainmenu and restart doesn't matter, the tree is back there.
here are a shot of the tree: (right to the door in the background is a small green way up to the top of the rocks)
and here are the location:
location by https://www.satisfactorymap.com/, hope the topview is up to date so the location is right :)