Version Found: 2015.3
When the user sets the DELAY_TYPE or DELAY_VALUE, the setting might not be correctly reflected in the code.
For example if you select VAR_LOAD, then in the HDL code generated by the HSSIO wizard, VARIABLE might be set instead.
Note: this Answer Record should not be viewed in isolation.
For all other known issues and to see what version of Vivado / High Speed SelectIO Wizard these issues have been resolved in, please refer to (Xilinx Answer 64216)
This issue is resolved in version 3.0 of the High Speed SelectIO Wizard, included in the 2016.1 release.
In older versions you will need to verify that the DELAY_TYPE or DELAY_VALUE are correctly set in the HDL code generated by the wizard.
For example the below code is from the rxtx_bs.v file, here Bitslice 6 is missing and Bitslice 5 is repeated twice.