Spell checking does not always give a suggestion when number of results are below the threshold

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: 7.0.X, Master
• Fix Version/s: None
• Component/s: Search Infrastructure
• Labels:
  • 7.1-won't
  • 7.2-won't
  • 7.3-known-issues
  • QA-V
  • liferay-ga4-ce-733
  • liferay-ga5-ce-734
  • liferay-ga6-ce-735
  • liferay-ga7-ce-736
• Fix Priority: 4
• Git Pull Request: https://github.com/brandizzi/liferay-portal/pull/788

Steps to Reproduce:

1. Go to search portlet configuration > enable spell checking
2. Go to control panel > configuration > search > reindex spell check indexes
3. Search for "test"

Expected Result:
A suggestion would appear under the "Did you mean:" text

Actual Result:
No suggestion appears under the "Did you mean:" text

Note:
A suggestion does appear when searching for "teST".
This issue happens for both the legacy search portlet as well as the new search suggestions portlet.

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7.22
portal master git SHA 8fe6936c72cfc0e3370095e3eadd71d1482bf624