The edge style is wrong when dragging about xyflow

[bcakmakoglu]

An edge and a connection line are two different things, hence why defaultEdgeOptions will not change the style/type of a connection line.
Edges are established connections between two nodes.
Connection Lines are lines that are drawn to establish a connection between two nodes (in other words, the connection has not yet been created).

There's a separate set of props for connection lines (besides using your own custom connection line).

In your case you would want to use something like this

<ReactFlow connectionLineType={ConnectionLineType.Step} connectionLineStyle={{ stroke: theme.colors.pattern.text.secondary, }} {...rest}>