Display of environment values in subflows a bit strange

General
1

I'm getting confused when adding and deleting environment variables in subflows
So I add this one in
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but it doesn't appear on this screen

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Then if I delete it

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it disappears from this screen

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but now appears on this screen

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Tried this in both a 1.0.3 install and a 1.1.0 - same behaviour

2

Its quite hard to follow those screenshots to understand what 'this screen' means each time.

If I had to guess, try not starting your env var with a _.

3

Here's a video of me doing it again