A couple of weeks ago I updated ExpressionEngine from 3.3.1 to 3.3.3. I followed the update guide https://docs.expressionengine.com/latest/installation/update.html exactly when doing this.
The upgrade went fine and in the footer of the Admin panel it is showing the version as 3.3.3.
Today I logged in and at the top of the Admin panel it has a warning message which says: "Your ExpressionEngine installation’s version (3.3.1) is not consistent with the reported version (3.3.3). Please update your installation of ExpressionEngine again."
The footer is still showing that version 3.3.3 is installed.
Does anyone know why this would suddenly start appearing and what to check to see the actual version installed? As far as we're aware no rollbacks or files in system/* have been modified other than template files and some CSS used by the frontend of the site.