KDE Plasma & plasma-manager: cannot change cursor and icon theme

Help
1

I cannot set the cursor’s theme, while setting its size works.

    workspace.cursor.theme = "Breeze_Light";  # No
    workspace.cursor.size = 36;               # Yes

Commenting out those then use the System settings UI to set cursor to light and/or icon theme to Papirus only works for the current session. The cursor and icon themes are reverted to the default after rebooting.

2

Where did you get the theme name from?

3

As advised by the docs, I ran:

plasma-apply-cursortheme --list-themes

You have the following mouse cursor themes on your system:
 * Adwaita [Adwaita]
 * Breeze Dark [breeze_cursors] (Current theme for this Plasma session)
 * Breeze Light [Breeze_Light]
4

Update: I found the causing config line:

configFile."kdeglobals"."KDE"."AutomaticLookAndFeel" = true;

But haven’t known a workaround yet.