Can you show me some screenshots of what you’re describing? I have tested making a nav mesh bounds volume, then editing it using Geometry Editing mode. Can you expand on how you edited the volume as well? When you say the green mesh appeared, but it didn’t work, what do you mean by that specifically? Will AI not navigate on it?
I haven’t heard back from you in a while and I was not able to reproduce this issue. If you are still experiencing this issue, please respond with the requested information and I will be happy to further assist.