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. 

 Yes, I agree / it’s def statistically safer to trust one extension rather than popping my key in to all of the many nostr apps that I’d like to try out. Also think you’re correct about what may have caused the issue as I do often clear the cache/cookies, etc.   Thanks for the knowledge/help. 👍