Hi there,
Well, I’m pleased to say the good old turn it off and on again solution =has worked!
I spent a very stressful day getting here though, but at least it’s sorted. I also bought (because I was in a flat spin) your plugin for WooCommerce.
Is that (paid for) plugin more bullet proof that this plugin, or is it just one of those freaky things that happened and there’s no reason to change the setup of the forms to make them more robust?