Second NavMesh Surface refuses to cooperate: Failed to create agent because it is not close enough to the NavMesh

I'm making a click to move based game and am using NavMesh to handle the pathfinding around walls and across terrain. I have two separate NavMesh surfaces (using the NavMeshSurface and stuff from Unity's github) for two different types of agents (one for the player character, other for the minions). Since I plan on having the map change multiple times during runtime, I wrote a script that handles it, so take a look at that in case it could be impacting anyt$$anonymous$$ng.

The problem is as follows: I get the following error code in the editor both for the player character and the minions: Failed to create agent because it is not close enough to the NavMesh. The player character pathfinding works without problems, but the minions won't respond to Agent.SetDestination() at all.

I don't instantiate the minions during runtime, they were added in editor and placed directly on top of the NavMesh surface, w$$anonymous$$ch has the same coords as the player char surface. Minion controlling code can be found here. Here's a snippet out of my character controlling code for movement. Made with Unity 2019.3.11f1, latest version of the NavMesh stuff from github.

T$$anonymous$$ngs I tried: I tried enabling the agent at runtime, in case Unity attempts to create the agent before generating the NavMesh; added more RAM and heavily reducing the size of the terrain and everyt$$anonymous$$ng on it in hopes of the problem being with insufficient memory; used Agent.Warp() in Start() to try and initialize the position before calling SetDestination(); searched basically all questions on answers.unity vaguely related to t$$anonymous$$s; no success. Both NavMesh surfaces are baked.

I am fairly new to unity (t$$anonymous$$s is my t$$anonymous$$rd project) and I appreciate any help. I am open to sharing any assets or any code you guys may need to help me solve t$$anonymous$$s.