Arturia Keystep and Yarns

Hi I have an issue with my arturia keystep > yarns where when I press play on the keystep (in ARP mode) the 4 channels of yarns flash instead of just outputting the arp to a single channel (midi channel 1 > gate/cv 1 on yarns). My workaround has been to just load up the P1 preset every time I press play but its a bit annoying. I’ve made sure no midi cc’s are being sent to yarns when I hit play. Anyone come across this or can reproduce on their system? it is a diy yarns so could be that.

Investigating on issues takes time – and thus I only do this for customers of factory-made modules.