Starting with 2018r1.1, open a new web project drag a text field and Web Button to the window, put something in the action event and run. If I press the tab key until the button is selected, I cannot press the space bar to select it. (Firefox & Google Chrome). It works fine with the same test on 2017r3.
Safari does not allow focus on a button and so it would never work that way, but I have many Windows users that are familiar with that functionality.
Is this a defect?