Navigation invokers not working only in the packaged build

hello i am having a huge problem with ai navigation invokers not working in a shipped packaged build but generates and works perfect in the editor and i tried many different things to get it to work with no success.
The very strange thing is that for a long time it was working perfect in the packaged build but all of a sudden it does not work anymore.
It seems like a big glitch in Unreal Engine itself, i realy dont understand what the problem could be all of a sudden :frowning: