Contact Garmin Support with details of your software version and report it as a bug. The icon should still be visible when the background colour is changed.
Thank you for your new forum post to bring attention to the issue. I have sent you a Private Message. Check the top right message icon when you are signed-in to our forums. Thank you!
The issue should be resolved with the current v11.21 Beta software for those part of our Beta Software Program. The official release will be coming in the near future within Q1 2023.
