I believe the last key_press is from the ctrl+tab to focus terminal. Before that I was trying to scroll the page using two finger scrolling. Nothing was painted.
Bug 1951249 Comment 23 Edit History
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I believe the last key_press is from the ctrl+tab to focus terminal. Before that I was trying to scroll the page using two finger scrolling. Nothing was re-painted. Immediately when focus starts to move to another window, painting happens again.