Sales Order Totals not updating

Hello All,

In Online BC, Total Fields link not working.

If we create SO with more than ten lines and released it, after that if we close this page and reopen it then all total field are reset to zero and if we click on Update the Totals then it gives error--

Status must be equal to 'Open' in Sales Header: Document Type=Order, No.=ORD/2018/12/0023. Current value is 'Released'.

To reopen it we have to send it for approval again and again. 

If I click on Learn Why and what to do link its not working.

For less than ten line its working fine.

Can someone tell, what is this??

Thanks in advance!!