[Plugin: Widget Context] sometimes shows widget, sometimes doesn't

I’m not sure why this is happening, but when using Widget Context, it sometimes shows the widget, sometimes doesn’t.

In particular, it has to do with the CTC plugin.

Would you be able to load up that plugin and see if you can spot the issue? I’m not sure how to debug it.

http://ww.wp.xz.cn/extend/plugins/widget-context/