Sliders set to NaN if clicked while having equal min and max value

[Einhornyordle]

1. Create a simple slider with min and max set to the same value (I tried setting both to 0, then to 1, both caused the issue to happen)
2. Click the slider (not the decrement/increment buttons, the slider itself, so the space between the buttons!)
3. The value of the slider is now set to NaN, but the slider doesn't show that yet
4. Try to increment/decrement the slider value by clicking on the respective button
5. Now it also shows a value of NaN