Hi David, I’m having the same issue. I contacted WordPress support and they told me to get in touch with organic themes. This is the reply I received
“Hi there! I see you’re using the Organic STAX theme, which is a third-party theme. I dug around our support resources and the only clue I can find is a couple of older reports of the same thing happening on other users sites with the same theme.
Although we are not seeing any updates recorded for your theme, it’s possible that these are either not getting logged or there’s some internal function to the theme that is causing this update. To determine this, I recommend reaching out to the theme developers here: https://organicthemes.com/support/
We were not able to find anything in their forums but if you reach out to their support directly, they may be able to provide more guidance.”
Any idea what I can do next? Changing the tagline every couple of days is painful.