Selecting a Variant automatically adds the item to cart bug

Got a similar issue to this:
https://community.shopify.com/topic/1058765

But it looks like the solution there doesn’t solve my issue.

When you try to select a variant from this page:
https://mommyhugs.ph/collections/2021-holiday-collection/products/sleigh-belles-red

You will be redirected to cart immediately.

Not sure what’s wrong in there.

Never mind. The bug was caused by one of the apps we installed. Because we deleted all apps I didn’t know which of thees caused the issue.

So it’s either

  • Discounted Upsells, Bogo Offer,

  • Mega Media Exporter

  • Shopify Email

Most likely it’s the discounted upsells because the other two are just used on the backend.