After the update from Jira software 9.12.2 (and JSM 5.12.2) to version 9.16.1 (JSM 5.17.0) our UI seems to be broken in the left side bar. It is both in software and JSM. The text is in white or light grey color and only be readable when you hover over.
It is happening in all browsers and for all users. We restarted Jira already but didn't fix the issue.