Visual inconsistent in showing data

Hello all,

I have an issue within Power BI desktop where my table does not show data although it is expected. 

I have added screenshots for clarification. 

I created a table with 3 columns (screenshot 1)

The data comes from 3 different tables (screenshot tables)

- containernumber from WB order table

- PO_NO from jc_po_to_data table

- Comments from container comments table

There is one active filter for containernumber (screenshot filters)

which results in one row with data (see screenshot 1 again) with

containernumber filled --> correct

PO_NO blank --> correct

comments blank --> incorrect becasue for this containernumer a comment should be available

The vsisual is inconsistent in showing this note. When I take out the PO_NO column, the comment is shown (screenshot 2) which is correct.

However, when I add the PO_NO column again, the comment remains shown (screenshot 3).

Does anyone  have an idea why the comment is not shown in the original table. I have checked if all fields have the 'show items with no data settings, and they are the same.

screenshot 1 - starting table

tables

filters

screenshot 2 - take out PO-no

screenshot 3 - add PO-NO again

show items with no data