CPCIS_Connectors_P1_P4_P6: voltage levels incompatibility at IC5/6/7
BP_DUAL* is 1.8V and BP_IO.LVDS* should be also 1.8V but according to the datasheet these multiplexers output high level at Vcc, which is in this case P3V3. Also the input high level is expected to be above Vcc-1V which means powering this buffer from P3V3 will not work at all with 1.8V signals.
Probably it would be better to power them from P1V8 and then voltage translate JTAG signals?