NPPI Label Markers adds zero pixel as object region

I’m using the boundSegmentsNPP example code from CUDA 11.1.1 with the following image:
m_segm_input_152
When using the function nppiLabelMarkersUF_8u32u_C1R with the flag nppiNormInf I get this result:
m_segm_input_152_boundSegments_nppiNormInf
Please note the area at right of the object which touches the upper border.
When I change the flag to nppiNormL1 (4 connected) I get this result:
m_segm_input_152_boundSegments_nppiNormL1

Same things happen if I use nppiFloodFillBoundary_8u_C1IR for example.

I’m pretty sure this is not how it should work. Has anyone an idea how to fix this?