On my local Environment and Staging Environment we have a problem where WFFM is appending the following querystring format to the urls after a form is submitted:
It wasn't doing this previously but I re-installed the WFFM Module and since then it has been happening.
It doesn't do this in our dev environment so it's a bit odd as the database used is the same as that used locally where it does append the querystring to the url. This suggests some file differences or config differences but I can't see anything obvious.
- Sitecore 8.1 Update 2
- WFFM 8.1 rev. 160304 (Update-2)