The default value for RX_DFE_KL_CFG2 in (UG476) represents a setup that is not recommended in a different part of the document:
On page 186 it states that bits 8:5 and 17:14 must be the same in fixed mode.
Also, the allowed range for these settings goes from 0 to 5.
This will be updated in a future version of the user guide and wizard.
For now use the values recommended in tables 4-12 and 4-13 in (UG476).