LMX2820: differential termination for OSCIN_P/N and SRREQ_P/N inputs?

For the OSCIN_P/N and SRREQ_P/N inputs on the PLMX2820 part, do we need to add the differential termination? The LMX2820EVM schematic shows the termination resistors, but they are DNPs and it’s using only the P side as input. The signal looks bad without a 100ohm termination added… so wanted to check if there is any internal diff termination that was not modeled in the lmx2820 ibis model….