In GSC there is a possibility of telling Google how to deal with URL parameters. Google suddenly started to index 600k+ URLs with parameters on our website. I have set the parameter in GSC as uncrawlable and about 400k pages dissapeared from index. So i thought everyting works as expected and the rest of the pages will be removed as well. After a month there is 300k pages again indexed.
Should It work and should I wait or do I have to set the pages as noindex?