broken links from Google with {"search_type":"post"} appended

[Mr Lucky]

I have started to see 404s from what might otherwise be a useful inbound link from google

e.g. https://cafesaxophone/thread/something.123/{"search_type":"post"} instead of what the thread actually is, ie https://cafesaxophone/thread/something.123/

So two questions:

What is happening here?

and

Can anyone please suggest a redirect that will work to strip out {"search_type":"post"} ?

Thanks
broken links from Google with {"search_type":"post"} appended

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