It happens to me every time. I am using Delphi 12 Patch 1 and KSVC 7.0.
Steps to reproduce:
1. Create a new VCL app.
2. Add a TRzSplitter to the form. I left all the properties as the defaults.
3. Add a RzListView into one of the splitter panes. I left all the properties as the defaults except for ViewStyle.
4. Set the RzListView ViewStyle as vsReport and define a couple of columns with text.
5. Run the program. The column text appears in the designer, but not while running the program.
6. If the RzListView FillLastColumn property is set to False, the column heading text does appear when the program runs. Note: I had to change it in the designer. Changing it at runtime had no effect.
Hope this helps.