Hello,
after migration from Jira 8.9 to Jira 8.20, we notice that every time the "Comment" section is expanded, Undo/Redo arrow buttons duplicate. Bug seems to be in Wiki style renderer that renders the entire "Comment" window.
Even removing all plugins and disabling all Wiki style renderer macros didn't solve the problem. Also tried to clear JIRA caches ($JIRA_HOME/plugins/.bundled-plugins, $JIRA_HOME/plugins/.osgi-plugins, $JIRA_INSTALL/work/*, $JIRA_INSTALL/temp/*) but with no success.
Does anyone meet the same bug? Can this bug appear due to some mistakes in the settings?
