This is a known issue in V4S Kiosk
Once the Volunteer has Checked in for a Job or Shift from the Signed up list, please do not close the signed up Volunteers pop up list immediately. Please stay on the screen at least for 15 seconds and then close the pop-up.
This is because if the Volunteer closes the pop up immediately after they Check-in the Volunteer is actually Checked In for the Job/Shift, but the button takes time to change to show the Check-In Time.
We will fix this issue soon.