It’s working.
I’m not sure exactly what happened. I’ll try to explain as best I can.
I’ve been playing with the plugin and trying different things. For example, I would deactivate the plugin, activate again and try new redirect page/slug names.
I’m not sure if this is a coincidence or not, but it didn’t seem to like using “Welcome” as the slug page for redirect. It did seem to like having an unblocked page and redirect page the same with same name. When I tried with different page names for each, it went into a loop.
When I created a page to unblock called Hello, and then used that same page for the redirect it worked.
It’s no longer having the redirection loop.
Hope this helps.