Navigation maximized and covers page all the sudden

It looks like my page’s navigation suddenly is all messed up. No major changes. A few product images replaced. did some google merchant/ads work today. I’m super confused.

What I know:

-If I Switch to an old backup of the current theme, the problem persists.

-If I switch themes the problem goes away.

-Didn’t install any apps or make any code changes. Last was maybe a week back.

Can anyone help direct me to get this fixed?

Being that old backups have the same issue, does it mean that there was a change/bug on shopify’s side?

website is here

Hi there,

I got the exact same issue, did you manage to find what happened. Our product page is all messed up now.