It seems something is going on with the facebook like counter which is used for the facebook like button. We noticed on a lot of customer websites that the like counter has suddenly became zero.
Let’s let’s hope this is just temporarily and facebook is not removing the like count!
A possible workaround:
On a few sites it helped to remove or append the trailing slash from a facebook page url. This is solving the problem often but not in any case.
So if you embed a facebook like button for a page like https://www.facebook.com/wpquads/, try to use the link https://www.facebook.com/wpquads instead and wait a little bit. If you are already using the url version without a trailing slash try to append it.
Do you experience similar issues on your sites?
Edit: Facebook confirmed officially that this is a bug.
07.04.2017 – It’s fixed