Related rules don't work for a product attribute that has a number in its code

[github-jira-sync-bot]

Steps

• Create a product attribute with a number in its code, e.g. at98_settore
  • Type = Dropdown or Multiselect
  • Add several values
  • Scope = Global
  • Use for Promo Rule Conditions = Yes
• Create a new related rule
  • Active = Yes
  • Apply To = Related Products
  • Products to Display:
    Product Category is the Same as Matched Product Category
    Product at98settore contains Matched Product at98settore
• Create several products with the new attribute, some of them have the same values selected (for the related rule condition to display). Add them to the same category
• Run full reindex
• Open one of the matched products on the storefront

(/) Expected result

• Related products are displayed

(x) Actual result

• No related products displayed

[github-jira-sync-bot]

The issue was exported from the internal Jira. The link to the original Jira issue: https://jira.corp.adobe.com/browse/ACP2E-1027

[m2-assistant]

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[o-iegorov]

The functionality is not related to the Magento Open Source, ticket was created by mistake