We are also having the same issue with UTM tags in SERPS:
?utm_source=rss&utm_medium=rss&utm_campaign=some-article-title
We have canonicals in place, but google still decides to show this. It's ok - google can decide on this if the links are from respective sources... well, we can't find those sources - checked search console, searched ahrefs. nothing.
We are using RSS to feed Google Publisher Center, but it does not have RSS values for links.
We are close to disabling our global website feed to get rid of non-canonical links on SERPs.
