Hi @Hugo, I successfully reproduced this problem as you can see in this video:
As you can see, I logged into the game being in a little base that i build that is relatively near to my neighbors and does not have any door so I guess it counts as outdoors (not sure if this details is relevant). From 00:25 to 00:45 I moved a table around my base and I placed it in one of the corners.
Then I moved to my actual indoors base which is just a few seconds away and log off.
Then I logged in again and I went to my little base. As you can see, at 2:11 I tried to place a table in the same spot where I placed the other table just a few seconds ago and I received the “Land already claimed message”. At 2:47 I even removed the table that I previously placed (sorry, that second is kind of choppy) and when I tried to put it back into the very same spot, I could not do it.
I’m in Official server #4523 PvE - g-portal.us
I hope this helps to understand better this issue. Regards.