We have a time entry form that includes 2 signature fields (one for workers, one for supervisors), implemented using Formidable Digital Signature (version 3.0.3). We have observed multiple cases where the field displays the wrong signature image when the form entry is displayed.  Given these users: 

• User A
• Supervisor B
• User C
• Admin User D

...this is roughly what happens:

1. User A submits time. They sign using the 'Draw it' mode.
2. Supervisor B approves the time.
3. Admin User D reviews the form entry for the time submission. It shows the signature image for another user (e.g. User C).

What we know: 

• At a guess this is happening in at least 5% of cases where the 'Draw It' option was used.
• User C may be someone who hasn't submitted a timecard in months.

What we do not know:

• Have not at this time verified that the issue is restricted to the Draw It option.
• We've had no reports from supervisors of the problem, so we don't know if the substitution happens before or after step 2, above.

On my to-do list to check: 

• whether a given signature image is displayed only once. (This is what I expect to find.)
• whether typed signatures are also substituted, or if this issue is limited to images.

Currently we're working around this problem by defaulting the signature field to the 'type it' option.  Can someone suggest areas to start looking for cause, or what other information we should be collecting to get to the bottom of this?