Hi Martin,
Really useful plugin.
However, the form does not display if using conditional logic. I deactivated the plugin and the same form shows up. I am using the latest versions of wordpress, php, gform, and your plugin.
.
I sense that this may be due to wordpress 4.3 upgrade. Please inform if you can replicate the issue.
Many thanks
https://wordpress.org/plugins/gravity-forms-multiple-form-instances/