JQL instability in recent Jira version – individual conditions work, but OR combination consistently

[Cory Cai]

I’m experiencing a serious JQL stability issue in the recent Jira version and would like to check whether others are seeing similar behavior.

Scenario:
Condition A → works fine
Condition B → works fine

However:
A OR B → consistently fails with search failed: com.atlassian.jira.issue.search.vsearch.SearchInternalException: Failed to run query

This is not a syntax issue. Both A and B individually return results quickly. But when combining them using OR, the query becomes extremely unstable and frequently fails.
The behavior feels unpredictable and performance seems significantly worse compared to previous versions.From a logical standpoint, if A and B can each execute independently, the OR combination should not completely break the query engine.