Resolved. Found drone issue in 20.4. Deleted drone.dat and drone.dat.bak files from server save, quickly logged on and emptied the drones inventory and put her away.
I can now log onto game without this issue.
Debating on updating to 20.5 on server. I did this once before without backing up the world, and the game was corrupted/lost. We had to start all over. We started again on 20.4 since I wasn't confident that 20.5 was stable.