I actually found a definitive solution. The agent radius.
Basically I edited the “recast-navmesh” object, which is created automatically when a navmesh bounds volume is added to the scene, reduced the value of the agent radius to 2, and that’s it! I got a great navpath!
Previously I did the same thing inside the project settings, but for some reason that didn’t change anything in the project.
Hope that this could help someone that will have my same problem!
Thank you for the help! 