This is page have Yandex Metrica params ?ysclid=....
And have canonical url: https://www.russpuss.ru/?ysclid=l81vha0pbw367639555
This is double content. critical issue.
Can you please fixed?
Also deleted page 404 have a fake canonical https://www.russpuss.ru/aziya/rabota-kitaj-ot-500-den-perelyoty-za-schyot-rabotodatelya/?wpforo=signup
All URLs have some query parts (?x=yz..) that are not wpForo parts. So you should find why these kind of query parts are added in wpForo URLs and remove them.
We'll add new filters in the canonical URL generation to remove such parts automatically in upcoming versions.