JQuery Spinner unselectable after entering zero

JQuery Spinner unselectable after entering zero

I'm having a problem using the JQuery spinner widget. If I manually enter
a value of 0 into the text field (not using the arrows for the spinner,
just entering a value directly), then the spinner greys out and I can not
select it. I have to completely restart the single board microcomputer to
get it back. Any ideas what could be causing this (code below)?
$(function() {
var spinner = $( "#spinner_current" ).spinner({min: 0, max: 100,
stop: function() { dlpCurrent();} });
});
<label for="spinner_current">Illumination Power (%) </label><input
id="spinner_current" style="width:30px" name="value">