Describe the bug

Best practices for assistive technology suggest inserting contents of a live region that is not hidden via display: none;, or at least putting the aria-live or alert role on a parent and toggling the visibility of children.
https://www.davidmacd.com/blog/test-aria-live-display-none.html

Steps to reproduce the bug

• Go to https://bootstrap-vue.org/docs/components/form-group
• Trigger the feedback messages in the demo component
• Inspect the rendered markup

Versions

Libraries:

• BootstrapVue: 2.21.2

Additional context

#6300 Addresses a related issue with redundant aria. It seems like removing the role: alert and going with the aria-live solution is the recommendation: https://www.w3.org/WAI/tutorials/forms/notifications/#inline
As with that issue, I am not basing this on testing, only research of the specs and the testing article above.