Never mind, this behaviour appears to occur on our website even with the redirect turned off, so I’ll need to investigate further. I think we can safely assume it’s not a result of the plugin. Thanks for your attention in any case.
Ah, I see the misunderstanding, I mean that if you remove the question mark from the URL, the redirect works properly. So the strange behaviour appears to stem from that character.
I have tested using regex101.com, and both expressions find everything in “[website].com/dynamic-link/news-feed?post=11” from “/dynamic-link/” onwards, which includes that question mark between “feed” and “post”.
The target is just the main page of the website (formatted as [website].com).