When I start open a Zig project in Zed, ZLS is not automatically launched. If I use the editor: restart language server command it starts and works normally. Checking the logs (Zed.log) it doesn't seem like it's failing to start, it just isn't being asked to start at all.
The problem happens both when loading Zed for the first time with a Zig project automatically loaded and when you open a Zig project from an open editor.