Usually you do that by making sure it's very glossy and is using reflection probes/cubemaps properly. Anyhow, I recommend asking in the forums, this place is for requesting features or reporting bugs!

No idea why this is happening, so I'm not sure when a fix will arrive. Any errors in the console? In any case, you can use the hotkey system in the meantime. (Hold a key such as N, and you'll see all available nodes that starts with that letter)

Mind that this applies only to custom lighting, and the directional specular lightmap mode. Other than that, lightmapping in SF for non-custom-lighting shaders should work.

The culprit is the object position node. Find a way to get rid of that and yet get the same effect you want, and you've solved it :)

This is likely just due to batching, which can be disabled in the shader settings

Are you sure you're running 1.27? Does it always happen, both when opening through Window -> Shader Forge, or only when opening it through the "open in shader forge" button on materials/shaders?

1.27 is already out, so, probably not! Not sure if I'll fix it in 1.28, we'll see

A few days I would guess!

This has been fixed in 1.27

Not sure. About a week perhaps?