Online friends displayed as a negative number??

I was on a discord call with 2 of my friends as we were about to play together in one of my worlds and noticed the friends tab was displaying -2. I took a picture to send to them since I thought it was funny but I didn't actually click on the tab to see what on earth it could mean by -2 as they were waiting on me to sign in and load my world. I'm guessing it had something to do with not being signed in (I think I may have been auto signed in at first then it had a problem and signed me out though I honestly don't remember)? Idk. Not a game breaking glitch or anything, just strange and something I've never seen or heard of before.