Rumors are that all foundries (Intel, TSMC and Samsung) are having problems with their 10nm node.
Yield problems at TSMC has caused the delay of MediaTek's Helio X30. Also, Yield problems at Samsung have pushed back the launch of the Galaxy S8 smartphone. This is according to Digitimes: Yields of 10nm FinFET Chipsets Are Still Low – SoC Suppliers Forced to Reschedule Shipment Dates (sorry, link has been paywalled, this is link to WCCFTech instead)
Meanwhile, is seems possible that Intel faces yet another delay on their 10nm node. BlueFin Research Partners have heard that "INTC is still struggling with defect/yield issues with this advanced process for High Volume Manufacturing (HVM) release and have not locked down the complete process of records (PORs) to date".