Hi Pit,
Yes, we still see the error:
[07-Aug-2020 08:52:58 UTC] PHP Warning: Invalid argument supplied for foreach() in /public_html/wp-content/plugins/facebook-for-woocommerce/includes/fbproduct.php on line 438
It is like almost every minute in the error-log.
It seems no impact on the sync of our products, but our error-log is already 8MB. It gets huge if i dont delete it on time. But the FB error make it huge everyday. So, we really need proper solution.
So right now we already updatet, but no solution.
There is no specific place that the errors pop-up. It is just every minute visible in the error-log. No impact on front-end.