In the Ghost version 3.41.3 instance it DOES NOT work… (the tags DO NOT show on hover of the navigation button, even though the container DOES show as well):
Thank you @Hannah - I’ve now removed the live site URLs since I solved the error, and also corrected the referenced version numbers. Sorry for the confusion.
In terms of the code that you “fixed”, this issue is that tags don’t have tags, so filtering tags on tags doesn’t make sense, I think you intended to filter your tags based on slug?
I guess some change in the codebase between those 2 versions resulted in us no longer ignoring the bad filter - it’s not ideal as it represents a breaking change in the API, but it’s very difficult for us to test and reason about all the ways the API could be misused & make sure they don’t change behaviour!
If you look in your server console/logs you should see an error, which you can also see by doing this: