Hi,
I’ve found a way to work around that, it’s not exactly setting the Nav Agent but it’s a way. In the Character Movement Component, you can use a node called “Set Nav Agent Props” where you can override the settings you need (Nav Agent Radius, Step Height, etc). This will force an update and will adjust the Nav Agent based on the settings you provide. I tried it out with 2 agents a big one with 88 half height and a small with 34. I’ve done the whole thing in BP.
Cheers