Navmesh Agent Snaps to New Heading

I'm working on a simple click-to-move project (i.e. click on the terrain and the selected object moves there). It works, but the agent snaps immediately to the new heading, rather than rotating at its maximum rotational speed. I must be missing a setting. Any ideas?

 

I think it may have something to do with the autoBraking bool.

 

I tried it with autobraking enabled and disabled and I get exactly the same result. It's probably a setting that I'm missing, but I can't find it. Thanks for the reply.