That is weird. it should work.
As a simple workaround, use a vanilla Redstone Repeater and place it AS A COVER on the Red Alloy Wire pointing downwards (or into whatever side you put the controller on). That will connect them. The same can be done with a Redstone Torch instead of a Repeater too, though that would invert the signal.
My guess as to why the wire wont connect is, that both the pipe and the wire use the same connection API, and they are labeled as two different things that therefore shouldn’t connect. Will see how I am gonna fix that.