I had Chrome changing the SSID password if I ever opened the Wireless / Access Control page. The edit box must have been labeled "password" in the HTML code, because it kept putting in my Meraki password.
I raised a support ticket to have then change the name of the edit box, and the problem has stopped occuring sometime after that.
When the problem was occuring, the site warned me that I had changes that needed to be saved every time I opened the page.
Dave Anderson