What were you doing before bug occurred: I was just minding my own business when in chat I saw “Notorious criminal Duffy was defeated by their rival (someone else’s username),” with Duffy being my own rival that I got the day before. I checked the bounty board when Duffy respawned, which said that he was rivals with the other player, and when I hunted Duffy, it was as if I was just hunting a regular criminal. Additionally, when I defeat other criminals now, I do not gain progress towards making them my rival.
To sum up, someone made my rival into their rival, leaving me with no rival at all and making me unable to get a new rival.
Steps to reproduce: Obtain a rival and then have someone else defeat your rival three times, making your rival their rival.
F9 Logs ( press f9 to view them in-game): I do not have any logs, unfortunately