Seeing a weird navigation behavior in modern team site linked to hubsite

I am working with SP Online in modern experience and many team sites created and linked to HubSite “Home”, the hub navigation shows perfectly fine.

Since last couple of days, I am seeing another row of weird navigation in a row below hub nav and I have no idea where this comes from. enter image description here

Can’t enable publishing features on team site modern, so navigation option is not even showing up under site settings, so how can it appear all of a sudden, was not showing up before at all.

Can someone please assist, thanks in advance.