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We notice that JIRA 7.6.3 was released on 08-Jan-2018 and JIRA 7.5.4 was released on 16-Jan-2018 !
it's not inconsistent ! what is the most recent version of these two?
If I remember correctly, the 7.5.4 was released specifically to address this issue:
You should always check the release notes too to see what is actually fixed / release.