I can definitely add support for exporting and importing all settings, as well as individual export for multi-communities and filters. While I'm at it, I may add a setting to temporarily disable filters.
As for the issue you were having with content not loading, or not showing up. This could only be caused by a couple of things.
- Content filters
- Listing mode eg. Local only on a remote community
- Hide read posts and having viewed all posts in a community
I've not had any other reports of such issues, so if it does happen again, please reach out and I'll look into the cause.