To work around the issue, a patch is required. A patch for the use case of using a CCIO with the LVCMOS or LVDCI driving a BUFGCE for the Vivado 2021.1 release is attached to https://support.xilinx.com/s/article/000034465?language=en_US.
Contact Technical support if the patch is required for a different Vivado release.
The IBUFDS_IBUFDISABLE path from IBUFDISABLE to O is a combinatorial path. If the path is covered by a timing analysis (Intra or Inter Clock path analysis) the timing will be incorrect.
There is no patch available for this issue. Contact Technical support if the there is a requirement to time with the path for a differential standard.