navmesh 2022.2.1f only working in development build and editor mode

The navmesh seems to only work in development build or the unity editor, if i switch over to release the navmesh completely fails. Version 2022.2.1f and the navmesh is the legacy navmesh.
i have tried using the navmesh update aswell to no avail. Anyone come accross this before?
regards

so this was caused by a package i downloaded from the unity store…
it somehow corrupted the navmesh during build time only. re-creating the project minus that dud package fixed…