How to set status for work items

Hello Friend's,

As per my client current scenario every work item will be sent to 3 useru2019s .If any one of the user click on work item it will automatically call a Ztransaction for further action. Here if the user has viewed the item and back to sap inbox by clicking the back push button(in Ztransaction) without any modification or taking the any action(SAVE) then the rest of other user (2 users ) work items are disappearing from other user SAP inbox.

But my client required that whenever the user click on back button it should be READY status to all the users and it should not disappear from other user SAP inbox.

Please provide me any advice to the above requirement.