Navmesh Skipping HISM instances (4.18.3)

Still having problems with dynamic navmesh generation over HISM instances. At build and in PIE everything is fine, but at standalone the navmesh randomly skips HISM instances.

I uploaded a short video of the bug at runtime:

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://forums.unrealengine.com/unreal-engine/announcements-and-releases/1410408-unreal-engine-bug-submission-form

Thanks