Different displacement values from SNAP 4 and SNAP 5

Dear everyone,
I am using IW TOPSAR for deformation studies. All works were performed in SNAP 4. Unwrapping was done in SNAPHU. Why all pixels in displacement layer have values. I tried to create displacement map in SNAP 5 too (only phase to displacement in SNAP 5, not previous processings). But SNAP 5 produced just reverse values. Means same pixels with positive values from SNAP 4 are showing negative values from SNAP 5. Editing Band Math as suggested by @ABraun is not helping. Please suggest.

Probably this is by intention. See the issue SITBX-390

Thanks Marpet.