%mintemp% Sometimes Reports 0.0 Degrees Unexpectedly

And another one - this one also showed up on the WD graph :?

Currently running WD 10.37Sb59 (2017/11/05).

This one occurred Sunday at 04:23am (2017/11/05) and the previous one was Sunday 04:12am (2017/10/08), anyone know what could be happening at this day and approx time?