Problem with the coastal regions

[NS-Nik]

Hello WaveWatch III community!

I have a question regarding running the model in the coastal areas.

By running the ww3_prnc.inp the wind and ice data are interpolated into my domain into the resolution which was defined on the grid generation stage.

However, in the case of the ice fields, the interpolation creates the nan mask in the coastal areas. I assume it appears due the fill values in the land mask in the ice data. The problem is this nan mask exists even where is no actual ice within the calculation domain.
And It cannot be fixed by making grid more finer, this mask is solely depends on the resolution of the ice data.

To illustrate the problem, here is two fields from the two runs in the coastal area. The grid resolution is 0.05 in both cases.

Ice switched on:

Ice switched off:

Are there any ways to solve this problem inside the model? Maybe by handling the NaNs in the different way?