25.04 theming issue (or is it an app issue?)

after updating to 25.04 public links show user icons. As these are public links, I do not want anybody to have an opportunity to enter names. Also, there is no need to have the “show outline” icon.
I tried working on custom css, alas, to no avail.
Do you have any idea why this happens - should I continue trying to et rid of the icons working with the custum css app, or is it may be to to another app (such as circles)?
An hint much appreciated
Thank you