After update to 1.4.21 all my sites which use Local SEO are having their geo_sitemap.xml and locations.kml redirect. This occurs with sites that use W3TC and sites without (I had searched and noticed issued mentioned in the past with W3TC so tested on sites with and without).
I've tried re-saving sitemap settings, re-saving local seo settings and clearing the location and re-saving local seo so the coordinates are regenerated (as well as clear caches for those with W3TC).
The other maps appear fine from the master sitemap_index.xml , it is just the Local SEO files that redirect.
In the past when I've had hiccups with sitemaps and yoast SEO a simple re-save of the settings on XML sitemaps has solved but as I've mentioned this is now not the case.