"tvout=view" stopping form submission for redirecting

I am trying to use CF6 for a form submission that carries out some PHP custom actions before redirecting to a landing page.
However, recently the form isn't submitting correctly and the URL is stuck on a white back with this query string:
https://<<domain/register/single?chronoform=signup&event=submit&tvout=view
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If I remove the "tvout=view" from the URL and F5 then the form will redirect for me.
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Is there a way to force that "tvout=view" to be automatically removed from URL submissions?

Hi mapme,
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I don't think that CFv5 adds that as standard. I suggest that you try hardcoding the form Submit URL without the tvout and see if that works OK.
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Bob

Thanks Bob - the issue is with CF6.
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I guess it is funny that it is auto-created in CF6... it's not something I am appending, and it is causing issues.
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Brendan

Hi Brendan,
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Sorry, my typo :-(
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Have you tried hard coding the Submit URL for the form?
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Bob