I just spent a couple hours trying to resolve this.
Here's a thread, answer in there: https://forums.tomshardware.com/threads/how-do-i-get-rid-of-chrome-exe-extra-box-in-the-volume-osd.3486794/
- Go to chrome://flags/#hardware-media-key-handling
- Set Hardware Media Key Handling to Disabled
- Restart the browser to apply the changes.