Inconsistent active window shadows between Server and Client-side decorations in tiled state
Observed on Ubuntu 19.04 Ubuntu Disco Dingo (development branch) Mutter 3.32.0-1ubuntu2
This inconsistency makes it harder to identify active windows.
Illustration of problem:
The CSD has shadows while the SSD does not.
Not sure this inconsistency is worth fixing, given the fact that consistent shadows won't be possible in the future anyway once more toolkits start using CSD. For example, Firefox's CSD behaves like server-side Mutter decorations - no shadow in active tiled state. Other hypothetical CSDs might lack shadows, active/inactive hints etc entirely.