While playing on 1.20.1 1.2.4 I discovered that linking multiple controller buttons to a single link causes the latter to only react to one of the buttons bound. For example:
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Here I bound the link to -Y first, then to +Y and lastly to RT:

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This is no buttons pressed:

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This is RT pressed:

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This is -Y pressed:

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This is +Y pressed:

This is unlike the Create controller which is capable of such a thing.
I use keyboard if this info is relevant.
Edit: I've just read another issue where this is mentioned, so this issue may be redundant.