Android 6.0.1 Not showing missed calls

[AC Question]

I have an issue with my Moto G4 Play where whenever I'm in a call and someone rings me there's no evidence that anyone ever called. There's no notifications showing that there was a missed call. This is an issue that concerns me as I need to know who calls me as my work depends on it. Does anyone know what's causing this and if there's a way to solve it?

 

[Tim1954]

Calls... Settings... More settings... There you can set up the call waiting function...