The latest version of TurboTax (v00.01.71 build 7005 2018.03.29) partially fixes this problem. Thank you for the improvement in context of T-slip changes. However, the same problem still exists (i.e. Change amount in sidebar settles at $0) when changing the selection of which spouse receives the Medical Expense deduction and the Charitable Donations deduction. This can be easily duplicated by entering medical and donation expenses, then going to the Medical Expenses Worksheet and/or the Charitable Donations form. At the top of either form, there are checkboxes for selecting which spouse receives the tax deduction. If you change the selection on either form, the sidebar amounts initially change, then move up and down, and once settled result in a $0 Change amount. It appears the developers have solved part of the problem related to displaying a $0 Change, but have not solved all cases.
