Pattern 1 with PC shown as empty?

I’ve just started using Patterns and the Track Option to send PC to my Digitakt on each Pattern and I’ve noticed something strange.

While Patterns 2-32 all show the CC indicator which means there is CC data on the Pattern, Pattern 1 does not, even though it is set in Track Options to send PC 01. Perhaps not surprisingly Pattern 1 is shown in the Pattern display as if it is a 100% blank pattern with blank checker board looking square.

Changing from any other Pattern (which send other Program Changes) back to Pattern 1 DOES in fact send the PC 01, but I’m confused why the Pyramid is showing this Pattern as blank.

Here are photos of the details for Pattern 1 and Pattern 2 which show what I’m talking about:

Any thoughts?