The objects you have to interact with are randomized for everyone, so it is not a bug.
Try to interact with some other objects like the skull, pumpkin or the sign for example.
+1, berries which are viable in PvP should be accessed more easily.
Also I am pretty sure by now they do not spawn on Love Island as I have been collecting the coconuts since forever and never gotten a Salac berry from there.
They werent there for me either. I think they arent supposed to be there as they are hiding elsewhere on the map. You probably will find out if you are looking around a bit on the map, some are pretty easy to find but some can be hard to see so make sure to look carefully.