The answer to that lies in the Keystep manual.
It might be configurable - just as an example, on Roland Gaia there is a system setting whether to enable arpeggios on external input.
I’ve tried several combinations. Now I’m using Sync In mode on the Keystep, coming in from a Volca Bass Sync Out (which is receiveing clock from Pyramid via Midi). This way I can play and sync arpeggios. But now I can’t ‘stop’ play command on the KS. I press ‘stop’ on the Keystep and it goes back to ‘play’ immediately, meaning I can´t play normal/sustained notes…
In combination with this I’ve tried different Midi In/Out with no luck still…
If anyone has any ideas, would greatly appreciate it.
Yes, meanwhile I solved it somehow, can’t remember how exactly. I’ve since sold the Pyramid… to get a Hermod. Pyramid really is great but I can’t have both