Synonym searches are not showing results for Knowledge Base asset types

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.2.X, Master
• Fix Version/s: None
• Component/s: Search Infrastructure
• Labels:
  • 7.2-sp1-known-issues
• Story Points: 3
• Fix Priority: 4
• Epic Link: Search Tuning: Synonyms (Phase 2)

Steps to reproduce:

1. Create a Knowledge Base article titled "android"
2. Add a new Search Tuning > Synonym Set "android, phone"
3. On the home page, search for "phone"

Expected result: The document "apple" appears in the search results.

Actual result: No search results appear.

Reproduced on:
Portal master-private Git ID: 8aa8225ed15f83a47db04881c98b101d9cf07baf