If the app is loading slow adding jquery to your theme.liquid usually solves the issue.
- Go to the Shopify Dashboard
- Under Sales Channels click on Online Store
- Click on Themes
- On the theme, you want to edit click on Actions > Edit Code
- Go to layout > theme.liquid and paste in the following code after the <head> tag.
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>