SACS - Wave loading on plate elements

Good day,

I have noticed that wave loads generated in SACS are not applied to plates elements.

To be more specific, I am modelling a caisson using plate elements. After applying the environmental information to generate and apply wave loading, it appears that no loads are applied to the model at all. Obviously if I add an extra caisson to the same model (the same caisson but modelled as beam) , wave loading is applied to it and acts as normal.

Is there a way to apply wave loading to the plate elements in SACS?

Thank you