If you use a slider menu element and set "min" to 1 and "value" to 1, the slider gets stuck at 1 and doesn’t move up.
//Edit: Removing the following in app.js & client/main.lua fixes the issue:
if (min > 0 && min == elem.value) elem.value = 0;
My item-setup:
{["label"] = "Example", ["value"] = 1, ["desc"] = "Example description", ["type"] = "slider", ["min"] = 1, ["max"] = 4, ["hop"] = 1}