When a clause buyout becomes available under Transfers → Clauses, the first click on the Sell Clause button is without function (other than sometimes moving the viewport) and remains present.
Only when clicking the button a second time does the clause buyout actually get triggered.
Steps to reproduce
Preconditions: manager has a clause buyout available
Navigate to Transfers → Clauses
Select a transfer with an available clause buyout
Click on Sell Clause
Expected result
clause buyout is triggered within 1st try
Actual result
clause buyout is not triggered