RGB Slider producing incorrect values.

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Create a bezier curve with a fill, go to the fill properties and RGB, starting with R, then G then B use the sliders to take each value up to 255.

Deselect the bezier curve then re select it and check the RGB values.

If they are all still at 255 then repeat this process in reverse lowering each value using the sliders to 0 and again deselect the bezier curve and then re select it and check the RGB values.

repeating this process you will eventually note that the last value that you set to either 255 or 0 using the slider will read 255 or 0 but the color you see on screen will not reflect that value and once you deselect and re select the the bezier curve you will see the value that was actually set. Usually it's off by anywhere from 2pts to 22pts for me.

Attached are two images, one is after moving the sliders but before deselecting the object, you will note the color does not match what the RGB values are set to and in the next image I have deselected and re selected the object and the RGB values now show what the value actually got set to.

Windows 10 Pro Version 10.0.17134 Build 17134 Inkscape 0.92.4 (5da689c313, 2019-01-14)