Hi Christopher,
Thanks for contacting Syncfusion support.
We have validated your reported problem in EJ FileExplorer control. We were unable to reproduce your reported problem when setting the ShowNavigationPane as false then it will be hide from the page. Please check the below attached sample.
Please check out the output of the attached sample.
If you are still persisting the issue, please share some additional details it will help us to provide you prompt solution.
1. FileExplorer rendering code block.
2. Share the Syncfusion product version you have used.
3. Share the issue reproducing the steps.
4. If possible, please replicate your problem in the above attached sample.
5. If possible, share the screen recorder video.
Please let us know, if you need any further assistance.
Regards,
Muthukrishnan K