Yes, due to a problem in Intel® Quartus® Prime Pro software versions 17.0 or later, Differential SSTL and HSTL inputs may not sample the input signal when implemented on bi-directional I/O in Intel Stratix® 10 devices if the respective VREF pin is not connected to a voltage reference. Differential SSTL and HSTL inputs should not require a VREF.
Device Family: Intel® Stratix® 10
Intel Software: Quartus Prime Pro
Last Modified: Tue Mar 19 2019 05:03:29 GMT-0700
Version Found: v17.0
Bug ID: 1507045879