Thinkpad Yoga cooling fan issue

Hi,
my TPY had been working pretty well for several weeks but last few days I´m experiencing an annoying issue - the cooling fan doesn´t engage when TPY gets hot under load, even when the core gets to 100 degrees Celsius and all the bottom and right side of keyboard and palmrest is really very hot. The cooling fan seems OK, during BIOS update it engaged. There must have been some kind of recent "update" that messed it up. Any advices how to fix it, please?
Thanks, Tomas from Prague
P.S.: I´ve gone through the power management settings - the active cooling set on - no change. In the BIOS there´s no feature to control the cooling fan  :/ 

I had very similar issues with the latest driver; device would disconnect, freeze, interfere with keyboard, display as "disabled" in device manager.
I simply just removed the synaptics driver and use the touchpad as a standard PS/2 device. Vastly improved stability but however you lose two finger scroll and gestures. 
I also am looking for a better solution.
(I also disabled the active protection and transition software from lenovo - much better keyboard/touchpad performance and stability).

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