404 error on woocommerce due to permalinks

It seems like our WordPress website (using WooCommerce) is experiencing 404 errors intermittently, which go away after we resave the permalink settings. This is a common issue and typically points to problems with how permalinks are cached or how rewrite rules are handled.

We have tried several solutions and we arrived here now:

A) Server Configuration ( we think its this one)
- LiteSpeed servers (as indicated in the 404 page footer) might have some specific caching or rewrite rules that cause permalink structures to get messed up over time.

*Solution:
- Check our server error logs for more information about these 404s.
- Ensure that LiteSpeed cache or any other caching plugin is properly configured to refresh or invalidate cache when changes are made in permalinks.

B. Database or Caching Issue
If the database or object cache is not properly refreshing, it can result in this issue.

Solution:
- Clear our WordPress object cache (if we’re using an object caching plugin).
- Check our database for any signs of corruption. You can repair the database from our hosting provider's control panel (e.g., cPanel) or use a plugin like WP-DBManager.

C. Custom Product URL Structure
We are using a custom permalink structure for our products (`/product/`). If WooCommerce or WordPress updates overwrite or incorrectly register these custom URLs, it may lead to 404 errors.

Solution:
- Make sure any custom URL structures are registered correctly in your `functions.php` file if needed.
- Test switching to the default or “shop base” permalink structure temporarily to rule out issues with the custom structure.

D) Final Steps
- After identifying the issue, if it’s caused by any plugin or server configuration, we may want to set up automated cache clearing or resave permalink structures with a cron job as a temporary fix.