Hi,
Thank you for writing to Microsoft Community Forums.
This issue could happen if the taskbar button are not set to combine, you can try the troubleshooting below and check if this works for you.
Are you facing this issue with all the other apps like notepad, wordpad etc. as well?
Method 1: Change combine taskbar button to Always, hide labels.
- Navigate to Settings > Personalization > taskbar.
- Scroll down to and search for Combine taskbar buttons from the right pane.
- Select Always, hide labels from the drop down.
- Close settings and check.
Additional information: How to use the taskbar in Windows 10.
If you still face the issue, reply to this post with more information and the screenshot of the issue.
Regards,
Amit Sunar
Microsoft Community – Moderator