Jquery differences with is(":visible") between versions <= 1.9 and >1.9

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jQuery

There seems to be a difference between these jQuery versions (<= 1.9 and >1.9)
when .is(":visible") a node.nodeType === 3. Does anyone know why this was changed?

What I have tried:

Here are two examples:

jQuery 1.9.1: Edit fiddle - JSFiddle[^]

jQuery 2.1.3: Edit fiddle - JSFiddle[^]

I haven't dug into jQuery source code yet, but that will probably be my next step if nobody knows why this changed.