Selecting correct display for Waveshare 2.9" R/B

Hi all,
I have a E-paper display 2.9" (296x128) Black/Red from Waveshare.
I am experimenting with various examples in the library.
In the example 'Hello World' i tried selecting various displays from the 'GxEPD2_display_selection.h' without any luck.
Some time the display shows text in the wrong font or not at all.
I am happy with the electrical connections.
My investigation tells me that this should work without any problem.
Could you indicate to me what is the problem?
I am missing something?

I am using an Arduino Nano.

Regards

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