This issue relates to the desktop version of TurboTax Premier 2024 (V 00.01.11 Build 1013 068G01). I purchased and downloaded it yesterday.
When I enter a T5008 capital gain for my spouse, the gain does not show up on the income summary screen. If I change the type of income from Capital gains to Interest, the amount is included in the income summary. Capital gain data for me is working fine.