Please Note - I have not experienced any problems, and assuming there should not be any.
I am just asking the question so we can define a patching policy and we need to 100% confident that we do not introduce any issues to some of our Business Critical sites by applying Nintex Forms or Workflow patches.
Or if there are any considerations we should note or test for when we do get around to patching.
Any feedback or info on other user experience would be welcome.
we did a lot of updates to forms and workflow installations of our customers for SharePoint 2007 to SharePoint 2016 and never had a single problem or data loss caused by an update. As long as you follow the installation / update guides and don't forget to also update the Nintex Workflow Databases you will surely be fine updating your product installations.
the risk is always there!
follow release notes of respective products and think of how listed changes and bugfixies might affect you.
for some releases nintex explicitely mention there has been made significant functionality change(s) and you might expect problems.
it as well might happen you hit a new bug that is not (yet) mentioned anywhere.
we have run as well into incompatibility problem of certain forms and workflow releases, despite we asked nintex for compatibility confirmation beforehand and were given approval.
Similar changes are tracked in product release notes for the specific version that does that, so always have a look on release notes!
In addition, my suggestion is to always test the update in a separate environment so you don't affect Production environment, especially if your workflows/forms are part of a critical process.