The little animated “now playing” icon does not appear in certain circumstances. It happened on Qobuz Kanneh-Mason’s “Romance” album, which is one of the few Qobuz albums with multi-track compositions properly grouped.
If one hits the play icon (on screen, not popup) next to the composition title, the now playing icon will not appear (at least on this album). However, clicking on an individual movement’s play icon will cause the animated icon to appear.
Problem seems limited to Qobuz; local and TIDAL albums function properly.
Update: seems to be album specific, because TIDAL’s version behaves the same way.