Crowd Manager avoidance not working in shipped version

Hello,

In UE4.21 I am using the CrowdManager to move groups of AI across my map. Everything is working as expected in the “Play” demo within UE4. The actors running from point A to B will avoid any obstacles I dynamically place on the map. When I “Launch” the game as Win64 EXE the dynamic avoidance seems to stop and the runners get stuck on the placed objects.

In the launched versions, actors that are part of the map at build time are OK. It is only dynamically placed/spawned actors that the navigation isn’t avoided. I don’t know why there’s a difference between the Play/Launch (Built) version.

Here are my settings:

And here is what it looks like when they’re stuck - again in the run mode they would be able to avoid this.

Thank you in advance for any insight!

Update enabling navigation in the console - it looks like it isn’t updating the navmesh properly. The navmesh registers and adjusts when I place the towers - but it stays green. In run mode it clearly turns red