After putting a P1 splitter DSMR does not read all values which it did read before

Because of the installation of a EV charger walbox which also uses the P1 port of my smart meter I bought a P1 splitter which is especially made for the type of walbox I have. But since this splitter is put in place I do retrieve values for many of the channels I used except for dsmr:electricity_v5_0::0:emeter_actual_delivery and dsmr:electricity_v5_0::0:emeter_actual_production and I am unsure why as the other values are just fine. I also upgraded to version 3.4.4 so maybe something related?