Which version of KeyLemon are you using? Since version 2.4, we have introduce the security levels. You can change the security levels in the General tab of the KeyLemon Control Center, as described below:
You can thus try to increase the security level.
Note also that this could depend of the quality of the model you have created. As described in our userguide
, better your position is, better your face model will be. Also light's condition could modify the recognition result. Try to get good luminosity.
I hope this is helpful.