I got this problem too, do you fixed it? 

Maybe you can try to edit code in theme.liquid

theme.liquid{%- comment -%}{{ content_for_header }}{%- endcomment -%}{{ content_for_header | replace: '12345', '' }}

So what can I do? Need To edit code?

Visitors Not Tracked: https://community.shopify.com/c/Technical-Q-A/Bug-with-Live-View-not-showing-visitors-on-the-new-world-map/td-p/976616/page/2Weird Visitors Problem: https://community.shopify.com/c/Technical-Q-A/Problem-with-visitors/m-p/496478B...

Today i got one visitor only.Also i use suppout chat to told Shopify Support Advisor, so he just told me what different is google analytics and shopify , how my ads conversions.He didnt fix this problem. 

Since Yesterday I got this problem too!My Google Ads account are showing 103 clicks，but Shopify and Google Analytics showing low traffic，only 15 (shopify) and 2 (google analytics) Visitors.