We tested RH editing tools in ArcMap and quickly discovered that many documented issues are resolved by performing edits with the 10.6.1 desktop version. The issues resolved in 10.6.1 enable us to most expediently proceed in our implemention so we are implementing at 10.6.1.
In our testing, the issues are resolved by only changing the desktop environment. We initially edited a 10.4.1 geodatabase version (based on server keycode version) in sql server. In my experience there is usually a few versions of backward compatibility between desktop version and geodatabase version. My latest server keycode is a 10.6.0 so that's what I was enable my SQL server geodatabase.