Custom Parameter Causing Errors

About 50% of the time, when I click links in the sidebar, they load with parameters that look like this:

?customize_changeset_uuid=65a251e4-45e4-4e49-b0cc-fdca99c75566&customize_autosaved=on

This is causing load errors.

I also sometimes get this error text when I click the links:

“Unauthorized. You may remove the customize_messenger_channel param to preview as frontend.”

I’ve cleared every cache I can think of, tried on my mobile – it keeps happening.

It happens when I’m logged into wordpress AND logged out.

Do you have a solution?

Thanks.