Bummer. This indeed works fine with Safari Version 11.0.3, the only one available to me. Haven’t been able to look at this through Safari 12.x yet.
I would like to avoid spamming the main topic when working on this, so could someone from the Discourse team please divert this discussion (i.e. the last three topic items) to Daemonite Material Theme: Ample layout adjustments? Thanks!