Convert widget to input doesn't preserve type

[romeobuilderotti]

TLDR: if a widget is converted to input after nesting, I can't connect anything to this input

Steps to reproduce:

1. Create KSampler and something else
2. Nest them
3. Convert seed (or steps or whatever) to input
4. Try to connect external input to it
5. Fail miserably

If I convert it to input before nesting, it will work correctly, but it makes the resulting node less reusable. Is there a way to fix this?

Here's a broken workflow for the reference