Not barely but signifiant. The grey color has an RGB value of 117,117,117 while the black is 0,0,0. If you don’t think this is much of an issue check this for comparison:
I am sure about the colors as I snapped screenshots and used the color picker tool to get the exact RGB values. In any case, the facts that on iOS it appears as expected and that even on Android the text input color is still black and that the issue appears in labels point to the fact that this is a bug.
I guess it is time for me to open a bug report.
K