Form submitted, not populating sheet


Hello Smartsheet Community,

One of our forms seems to have stopped working. The form is successfully submitted but it doesn't populate the sheet, it's not hidden anywhere i.e. at the very bottom and I've created multiple forms and it's still not working. I've also tested another form we use for a different sheet (same process) which works fine.

I've checked activity since the last form was submitted and although columns have been deleted, they're not linked to the ones on the form or what information needs to be on the sheet.

I'm at a complete loss as to what's happened and need to solve this quickly as we're at a standstill and use this form on a very regular basis.

Thank you,