CX2 is regularly producing bad wikitext with <cite class="citation web cs1" data-ve-ignore="true"> crap.
See a list of such problems in this dump analysis.
It'usually in a ref tag, the cite tag is added after the actual template. This is not the only problem : the template is usually incorrectly filled (missing required parameters and useful information) ; if a reference is used several times it's duplicated sometimes with different content leading to errors reported by MW...
Various examples on Affaire GSK en Chine, where you can see the same reference resulting in several different results :
<ref name=":21">{{article|date=2016-11-01|langue=en-US|consulté le=2020-01-08}}<cite class="citation news cs1" data-ve-ignore="true" id="CITEREFBarboza2016">Barboza, David (2016-11-01). [https://www.nytimes.com/2016/11/02/business/international/china-rules-glaxo-bribes-sex-tape-whistleblower-cautionary-tale.html "Drug Giant Faced a Reckoning as China Took Aim at Bribery"]. ''The New York Times''. [[International Standard Serial Number|ISSN]] [//www.worldcat.org/issn/0362-4331 0362-4331]<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-01-08</span></span>.</cite></ref>{{,}}<ref name="Barboza">{{article|date=2016-11-01|consulté le=2020-01-08|langue=en-US}}</ref><ref name=":22">{{article|nom=Barboza|prénom=David|date=2016-11-01|titre=Drug Giant Faced a Reckoning as China Took Aim at Bribery|langue=en-US|périodique=The New York Times|url=https://www.nytimes.com/2016/11/02/business/international/china-rules-glaxo-bribes-sex-tape-whistleblower-cautionary-tale.html|consulté le=2020-01-08}}<cite class="citation news cs1" data-ve-ignore="true" id="CITEREFBarboza2016">Barboza, David (2016-11-01). [https://www.nytimes.com/2016/11/02/business/international/china-rules-glaxo-bribes-sex-tape-whistleblower-cautionary-tale.html "Drug Giant Faced a Reckoning as China Took Aim at Bribery"]. ''The New York Times''. [[International Standard Serial Number|ISSN]] [//www.worldcat.org/issn/0362-4331 0362-4331]<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-01-08</span></span>.</cite></ref><ref name=":141">{{Lien web |langue=en-US |titre=Curbing Corruption: GlaxoSmithKline in China |url=https://ethicsunwrapped.utexas.edu/video/curbing-corruption |série=Ethics Unwrapped |consulté le=2020-01-08}}<cite class="citation web cs1" data-ve-ignore="true">[https://ethicsunwrapped.utexas.edu/video/curbing-corruption "Curbing Corruption: GlaxoSmithKline in China"]. ''Ethics Unwrapped''<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-01-08</span></span>.</cite></ref>Could you fix CX2 ? This is a nightmare for wikignomes...