It would be useful if WDQS URL-escaped parentheses (()) in the address it builds from the query (https://query.wikidata.org/#QUERY_GOES_HERE). For example, Twitter sometimes thinks that the parentheses are not part of the link, and so you have to escape them manually (Workaround: xclip -o | sed 's/(/%28/g;s/)/%29/g' | xclip).
This is similar to T40265, in that it could be considered a bug in another application (here, Twitter), but as WDQS URLs are already not really readable (nor, I think, intended to be), I hope you’ll still consider mitigating it on the WDQS end.
To clarify: entering and running the query
SELECT (COUNT(?human) AS ?count)
WHERE { ?human wdt:P31 wd:Q5. }should result in the URL
and not
.