First pixel not changing colour (WS8211)

Hi all, I'm fairly new at all of this, but I am trying to build my first megatree for christmas.

I am running a Hanson electronics HE123 MK2, with FPP and Xlights.


I just got my controller powered up and started out testing my strings of pixels for the tree using a simple sequence as an arch with the butterfly sequence.

When I run the sequence the first pixel is not changing colour. If I run a test sequence say all green or all red, the first pixel is changing colour with the rest of the string as intended.


When I try to test on another string, it is the same issue, so I don't think it is a pixel issue, it seems like possibly a setting in xlights that I have messed up. Any ideas on what could possibly be wrong here?

You're not doing anything wrong. With a butterfly effect, the bottom left-hand pixel is always red.
Try using a different effect like single strand.

Ha, ok then. Don't mind me.

Yeah, I don't know why that bug (seems like a bug to me) has never been fixed.

The pattern has the red constantly collapsing into the bottom corner. Mathematically I'd say it's part of the effect equation. But *shrug* it is what it is....