Project Import user map mismatch. Wrong Executed By user when Jira source and target user keys do not match

After Project Import, the execution page returns wrong Executed By user when source Jira user key does not match target Jira user key.

This may also happen for other entities:

1. Creator field, for each folder in the Test Repository (confirmed)
2. User Picker Test Step and Test Run Custom Fields (to be confirmed)
3. Activity Entry (to be confirmed)