sv-handle-disable is evaluated on the incorrect element.

[jkutianski]

If you've a custom handle, with multiple childs on it, e.target can be any of the child but not necessary the one withsv-handle or sv-handle-disabled.

[Fedik]

the fix:

var svHandleDisabled = $attrs.svHandleDisabled ? $parse($attrs.svHandleDisabled)($scope) : false;
if (svHandleDisabled) return;

[shennero]

@Fedik that fix didn't work for me but it led me to what did:

//replace                     
var svHandleDisabledAttr = e.target.attributes['sv-handle-disabled'];
//with
var svHandleDisabledAttr = e.currentTarget.attributes['sv-handle-disabled'];