Clicking the Back button on the knowledge form when in IE11 or Firefox always selects the Tags tab.
Steps to Reproduce
In a Firefox or Internet Explorer 11 browser window, navigate to the Knowledge homepage and select any article.
This issue does not occur in Chrome.
Click the Back button.
Note that the Tags tab is selected instead of Categories.
For a temporary workaround, use the Chrome browser.
If you are able to upgrade, review the Fixed In field to determine the versions that have a permanent fix to this issue.
Related Problem: PRB675599