Pretty sure its a bug. Plankerton endurance Spawn points are all around the Amp. : r/FORTnITE
FORTNITE - Plankerton Storm Shield Defense 6 Solo Without Shooting, Rebuilding Or Repairing - YouTube
Information regarding SSD spawns : r/FORTnITE
Made a castle in my Plankerton SSD with u/idkwhat2put4this! : r/FORTnITE
Plankerton SSD Base Build MEGA Castle 20k+ Materials Used - Welcome To Fortnite STW Oblivion! : r/FortniteSavetheWorld
Last update for the Twine Peaks, Canny Valley, Plankerton and Stonewood Endurance/SSD/Wargames Spreadsheet (link in comments) : r/FORTnITE
Plankerton SSD All Amps, Spawn Points and Trap Tunnels - YouTube
Fortnite Plankerton SSD 8 Set Up - YouTube
This is not the first time but some PLANKERTON VBucks missions doesn't show up on my map and I can't do them. Today was a PL 23 Fight the Storm mission and
Twine Peaks SSD / Wargames Spreadsheet, 3rd times the charm : r/FORTnITE
Fortnite Plankerton SSD 2 Solo - YouTube
Plankerton SSD and Wargames Reference Sheet : r/FORTnITE