The embedding of graphs from WDQS in Scholia has since around 14 May 2018 produced spurious results. The errors are not necessarily reproducible.
Often we now get "Server Error" with "Rate limit exceeded" or "Unable to display result" where we rarely before experienced these problems.
At other times there is a strange spurious result returned with id, label and description even though the SPARQL query should return something entirely different. We have seen the case for, e.g., https://tools.wmflabs.org/scholia/author/Q8219 in the panel "Number of pages per year". Sometimes a reload will fix the problem. It is as if we get another result from a wrong cache.