Yes that is the button I am referring to. However, I have actually realized that this may be an issue with Ultimate Addons for Gutenberg because that is the plugin that provides access to the “Marketing Button”. When I initially posted this I believed (wrongly) that this was a feature of GeneratePress.
Yes it is inserted by the Ultimate Addons for Gutenberg theme.
Yes the issue happens when I change to another theme.
Seems to happen whenever I change the background colour of the Marketing Button.
My console has errors including:
TypeError: Cannot read properties of null (reading ‘r’)
The error is coming from react-dom.min.js?ver=17.0.1:141