Hello Jacob,
Since this is a widget created by Mendix I believe they also support it.
I suggest checking your contract with them and SLAs, raising the issue at https://github.com/tieniber/GridSearch/issues , and also raising a support ticket if your contract suggests that Mendix will support you on first party widgets.
Edit: Looking at the issues page for the widget, this appears to have been previously reported here. Might be worth giving it a bump.
Hope this helps.