The red flags that display on the linked cash account and the partner investments account when a transaction is downloaded do not disappear from the investment account when the transaction is posted in the linked cash account like it used to do. Even though there is no other downloaded transaction for the account. In order to clear, I have to right click in the Account vertical bar section and toggle between Current and Ending balance, or restart Quicken. Then the flag disappears.
I have reported the problem.