Null Item problem with reverse outputs

Hi All,
The question is whether this is a bug. Kangaroo outputs a list of lines with Nulls for the first 12 terms. I want to get rid of those Null terms. Using a vanilla ‘Null items’, the lists that are output are correct. However, when i right-click reverse the output, all the ‘trues’ are changed but the ‘falses’ stay the same.
Many thanks (24.7 KB)

IMHO, What you really should do is to invert the boolean pattern, not reverse the list order.
BTW, you don’t have to remove all those “Null” values, if you flatten the “L” input of removeDuplicateLines beforehand. Check the red group out. (15.2 KB)

Thank you very much for having a look, I took reverse to mean invert. And thank you for sorting the mesh.