Y-axis stop working during usage - Estlcam + cnc-shield


need help by a strange phanomenom using Primo built with Estlcam and cnc-shield:

I use my new Primo built as in the guides but during driving the y-axis, it suddenly stopped working and will not resume. Both other axis still operational, but the y-axis does not. After I switch cables back and forth at some point it work again, but I was not able to realize what /where the problem is.

Anyone encounter that also? Any ideas?

Thank you,

Do the motors hold their spot when they freeze, or can you move them without resistance?
Does it do it for any project you try to run, or is it only one specific project?

You may have a bad cable/connection somewhere.