I’m a moderator in a Twitch channel, with the 流水の… user in the attatchments.
I’ve added Nightbot to the discord server since September 2020. Since then, it has been adding the subscriber role more than ten times every day.
Also, 流水の… and I are not subscribed to the linked Twitch channel. We are only moderators of that channel.
I’m not entirely sure if this only happens in that server, so I’m not sure if you’ll be able to reproduce this bug.
Be a moderator (not the owner or a subscriber) of a Twitch channel.
Link Nightbot to a Discord server.
Make a Twitch moderator role and Twitch subscriber role and link them to Nightbot. (make sure your Twitch account is linked to your discord account as well)
After a while, check the audit log to see if the bug occurs.