Disabling Importing Linked Issues and Sub-tasks

Question: Why are unwanted issues being imported when my JQL filter excludes them?

Answer: Unwanted issues may be imported if the settings for importing linked issues or sub-tasks are enabled. To ensure only issues matching your JQL filter are imported, set the 'Import Additional issues' option to 'Do Not import' and disable sub-task import. Also, double-check your JQL filter.