A friend buff was placed on my island and explorers returned with loot so I sent them out again after event started and they return every minute with no loot and I send them out again with same result.
If I do not send them out they still show as returning about every minute or so on left side of screen, I have refreshed , logged out and back in but with no effect.
looks like these explorers are not going to get any footballs until there is a hotfix