This is something I figured out quickly.

The issue was with Shopify adding the store name to the page title of (some) blog posts.

The step-by-step solution is the following:

1. From the Shopify admin, click on Online Store. This will default to Themes

2. Click on the three dots (...) next to the Customize button

3. Select Edit Code from the dropdown menu


4. In the next screen, under Layout select theme.liquid

5. Finally, replace the code within the HTML <title> and </title> tags with the following one:

<title>{% if template contains "index" %}{{ page_title }}{% else %}{{ page_title }}{% if current_tags %} {{ 'general.meta.tagged_html' | t: tags: meta_tags }}{% endif %}{% if current_page != 1 %} {{ 'general.meta.page' | t: page_number: current_page }}{% endif %}{% endif %}</title>
Credit: ezfycode.com