Hi there @mpedersen ??
random hiccups where product categories or individual products, and sometimes the entire store, simply goes away and navigating to these pages comes back with a “No Results Found” error message.
Thanks for reaching out, let’s figure out why things are not lining up!
From what I gather, this started happening on your site(s) lately; alas, the most recent incidents that I could find, where something similar was reported date back to over a year and a half ago.
This kind of problem is usually caused by a conflict with your theme or with another plugin.
The best way to determine this is to:
1. Temporarily switch your theme to Storefront or Twenty Twenty theme.
2. Try to reproduce the problem: Check whether you still encounter the issue!
If the problem is resolved, it’s a theme conflict. If not, continue to the next steps.
3. Temporarily deactivate all plugins except WooCommerce. You can do this manually or use a plugin to help (see below for tools).
4. Try to reproduce the problem again. If the problem is resolved, it’s a plugin conflict. To figure out which plugin is causing the problem, continue to the next step.
5. Reactivate your other plugins one by one, testing after each, until you find the one causing conflict.
For more detailed instructions, check out How to test for plugin and theme conflicts.
Tools to help with troubleshooting
Meks Quick Plugin Disabler will remember what plugins you had active when you switch it back on.
You can clone your site to a staging environment and perform tests without modifying your live site or impacting customers. Many hosts provide staging facilities, so it’s worth checking in with them. It’s also possible to do it using the free WP Staging plugin.
Please let us know how that goes.