This is really specific issue with Nav Mesh and this is Fixed 100 % and works in 4.22.3 and 4.23.
If you would read an Issue that is described here you would see that In packaged game Ai still can move but in limited area.
Your Issue can be anything… Starting with maybe your nav mesh is placed not in Perssisten level, or if you use Nav mesh Invokers something is not configured correctly.
If you have still an Issue I would test it in 4.23. If you still have Issue After testing in 4.23 then fill out proper Bug report.