Config’s default_shell not respected when creating a new tab with a layout

[Zykino]

Basic information

zellij --version: zellij 0.34.4
uname -av: Linux zykino-pop-os 6.1.11-76060111-generic #202302091138~1675975749~22.04~f771a7f SMP PREEMPT_DYNAMIC Thu F x86_64 x86_64 x86_64 GNU/Linux

Further information

rg shell ~/.config/zellij/config.kdl
17:// Choose the path to the default shell that zellij will use for opening new panes
20:default_shell "fish"

The layout I’m crafting

layout {
        pane size=1 borderless=true {
                plugin location="zellij:compact-bar"
        }
        pane split_direction="vertical" {
                pane edit=""
                pane split_direction="horizontal" {
                        pane command="cargo" {
                                args "test"
                                start_suspended true
                        }
                        pane // <- Default shell here
                        pane command="gitui" {
                                start_suspended true
                        }
                }
        }
}

Open with zellij action new-tab -l ~/.config/zellij/layouts/IDE-rust.kdl.

I expected the configured default_shell (fish) to be opened (like with Ctrl+p or Ctrl+t).
bash opened instead (my user’s sessions default shell). I let it as default since fish’s docs says it should not be set as default.