Steps to reproduce

1. Log in to back office.
2. Go to Content / Content types.
3. Edit any content type Landing page.
4. Add to page builder Text block.
5. Go to settings of Text block.
6. Add anchor and save the form.
7. Verify anchor icon.

Actual result:

Anchor icon is not properly displayed, icon is barely visible.

Expected result:

Properly displayed an anchor icon.