Try using the nos2x-fox browser extension (assuming you're using Firefox). It's a safer way to log in since you no longer have to c/p your secure key into the site, and you can also save your preferred relays in it so it will always send those to the client whenever you log in.

I don't think it's malicious, it's probably just Iris being a buggy client. Especially if you clear your cache/cookies often, it will lose any settings you entered, such as the relays you added.