I experience a similar problem as the autohor of this thread.
My sitemaps are not fetched by Google Search Console and when looking into it I see that my sitemap URLs are all redirected to 404-error pages.
I setup WP Super Cache earlier today so when I noticed the flaw with the sitemaps I thought the problem was in the cache. I excluded the sitemaps from being cached following the procedure you outlined above, but the problem is still there.
Do you have any suggestions? Maybe it is a matter of time (I put sitemaps as excluded only 15 minutes ago).
Please let me know,
The ticket ‘Sitemap Issue’ is closed to new replies.