Not sure if I should post this question here or surface or assembly

I have a part with some features built on surfaces.  I hide the all surfaces at the end and everything looks good

Problem is, in the assembly, one surface of the part is visible. Sometimes, rebuild did the trick, other time, I have to edit the part, do nothing,  and go back to the assembly to see the surface disappeared

I should mention here, in the same assembly, I have other parts with some surfaces but none of them is visible in the assembly. Not sure if this particular part is corrupted or there is something I need to check on/off

Thx for any response.