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 Select IO Wizard these issues have been resolved in, please refer to (Xilinx Answer 64216)
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.