Intermittent issue with dynamic routes using Nuxt and NetlifyCMS

When going directly to

www.wealthampd.com/blog

the redirect kicks in to the homepage (www.wealthampd.com)

if you use the menu (top right) to go to the blog, the redirect doesn’t do anything (which is intended)

I’m sure this will be some sort of config issue that I’ve failed to set up but unsure what it could be.

I’ve checked the redirect guide and have downloaded a .zip of my latest deploy to check the _redirects file but it all looks sensible to me.