www. not showing on base domain but shows on other url's

Hey guys,

I hope all is well!

We recently changed web host and somehow, in the change, our base url is not showing up with the "www" in Google. But weirdly every other page is.

So for example, if we search for our site, it shows:

https://

if we look search for a deeper page it will show in Google results as:

https://www.

But, if we click on the main domain, when we get to the site the url it lands on has www. in it.

In our Google Search Console if I look at our urls, every url listed has a www. in-front of it. Except our homepage.

I am assuming this is a robots.txt issue, just not sure which way to go here.

Has anyone seen anything like this before? We are still ranking pretty well and getting good organic traffic, I am just concerned this is hurting us a bit and would like to fix it.

Any help/thoughts/guidance would be greatly appreciated :)