Tested on OSX: If I make an rslider with range(-1, 1, 0, 1, 0.01) it will show data to the hundredths value as expected over most of the range of the rslider, but as I approach center suddenly it will display a few more significant digits in the value. For example: “.009999998”
This can be recreated with other range values too, but this is the easiest for recreating it.