I've noticed this since yesterday and I get the same result in Chrome and Firefox.
The small adjustment arrow buttons in the toolbar, such as sizing and moving objects seems to have changed. When holding down on an arrow button I no longer get a live preview of the action in the canvas. So if I'm holding the button for a while to move it a good distance, the object won't update as I go, but will only update at the end of the operation.
Also, when tapping the buttons rapidly sometimes the software won't register a random press, I've never had this issue before.
Has anyone else noticed these behaviors recently? They really make the UI feel less solid and responsive to me.