In this section, we describe the problem of artifactual local minima that occasionally arises when using D3 models. We begin with the serendipidous story of how this artifact was discovered and discuss its significant impact on the vibrational frequencies and thermodynamic properties of the system under consideration. It was these unexpected values for observables that caused us to look for artifacts in the calculations, which we then established to be associated with the D3 correction. We then explain the reasons why such errors occur within the D3 models and provide additional illustrations of analogous spurious local minima in various other chemical systems. Subsequently, we propose a solution to this problem in the form of a modification to the D3 correction that is smoother (D3S). In the final part of this section, we comprehensively evaluate the modified D3S correction in terms of accuracy and its effectiveness in eliminating the problem.