This isn’t a 4 year old issue, it is a newer issue that has popped up and people have posted on an older issue thread. This is being followed in our Fix-It Friday and there is currently a work around to try and get it fixed.
Discord - Camera time and notification time do not match
We believe we’ve identified the root cause of this. In the meantime, please try manually changing your cell phone’s time zone to a different one, leave it in the other time zone for 5 - 10 minutes, and then change it back. We’ve heard back from customers that this workaround has helped with this problem. If this hasn’t worked for you, please let us know!
Link to Fix-It Friday thread