Issue with Data Loss in Collected Signatures (Signature missing)

bdplazo · January 13, 2025, 9:31am

Hi,

My name is Begoña, and I am part of Action Against Hunger in Spain. We have detected issues with missing signatures in some Kobo forms.

My Kobo username is: xxxxxxx

The affected forms are as follows:

‘Solicitud de Inscripción Eje de Empleo Andalucía Oriental 2025’
‘Solicitud de Inscripción Eje de Empleo Castilla La Mancha 2025’
‘Solicitud de Inscripción Eje de Empleo Madrid 2025’
‘Ficha de Inscripción Vives Emprende, Emprendimiento Juvenil y Comunidades Rurales 2025’

For now, the following forms do not show any responses or errors, but they follow the same structure as the ones above, so I suspect the same issue could occur:

‘Solicitud de Inscripción Eje de Empleo Andalucía Occidental 2025’
‘Solicitud de Inscripción Eje de Empleo Asturias 2025’
‘Solicitud de Inscripción Eje de Empleo Cataluña 2025’
‘Solicitud de Inscripción Eje de Empleo Comunitat Valenciana 2025’
‘Solicitud de Inscripción Eje de Empleo Extremadura 2025’
‘Solicitud de Inscripción Eje de Empleo Galicia 2025’
‘Solicitud de Inscripción Eje de Empleo Navarra y La Rioja 2025’
‘Solicitud de Inscripción Eje de Empleo Región de Murcia 2025’

These forms are hosted on the following server:

We kindly request your guidance on how to proceed to address this issue.

Thank you in advance for your assistance.

Best regards,
Begoña Lazo

Kal_Lam · January 13, 2025, 1:11pm

Welcome back to the community, @bdplazo! Thank you for bringing this to our community! Kindly please be informed that we are investigating your issue and will get back to you once we find anything.

But there is a high possibility that your issue is the same that has been reported previously:

github.com/enketo/enketo

Data loss: not all signature images are uploaded in offline-capable forms

opened 07:44PM - 18 Oct 21 UTC

closed 06:47PM - 14 Dec 22 UTC

p2edwards

bug offline-only

**Description** This is an intermittent bug that results in a loss of signatu…re images. If a form includes multiple image questions, at least one of which is `appearance: signature`, and the form is running in offline mode, it is likely that one or more of the signature image files get lost in the submission process. **To Reproduce** When running a form like this in offline mode: type | name | label | appearance -- | -- | -- | -- start | start | | end | end | | image | sign_now | sign now! | signature image | sign_again | sign again! | signature The first or second signature image is likely to be missing, for each submission. other factors: - must use offline version of form to reproduce bug - happens on 2.5.6 and 2.8.1 (about to test on 3.0.1) - tried to sign both fields as quickly as possible - having a non-signature appearance image in the form can also "crowd out" the signature file but regular images do not crowd each other out based on our testing so far. **Expected behavior** Desired behavior is that no attachments are missing upon submission. **Browser and OS** - OS: Issue has been reproduced on macos and Linux. - Browser: Issue has been reproduced in Chrome and Safari. **Additional context** I'm looking into this now, so I can add screenshots or improved description soon.

bdplazo · January 15, 2025, 8:30am

In our case, the forms are generally used online and there is only one signature field.

We’ve noticed that this issue only occurs when completing the form in a mobile browser, and not when using a computer. I’m attaching a screenshot of the error (it’s in Spanish).