A template is created from a released item, that has no item group or item model group assigned. This template is applied on other released items as well. The user then goes to template records from Home screen and opens the shared item template created earlier, as the template has to be modified with default values for item group and item model group. After the values are entered on the template and the screen is refreshed, the updated fields are blank and the process stops with an error message. Applying this template on new products will also leave these fields blank.
The hotfix promises template edit can initialize and save data correctly.