I can partially reproduce this on Linux: if I press Ctrl while overscrolled _and with my fingers still on the touchpad_, then: 1. The overscroll gets stuck in that position (no snap-back animation) 2. Further movement on the touchpad causes (reflow) zooming in or out I think (2) is fine in this scenario (it's no difference from if you pressed Ctrl while your fingers are still on the touchpad and _not_ overscrolled), but (1) is a clear bug (we should never get stuck in an overscrolled state). --- For the other part of the issue (pressing Ctrl _after_ the fingers have left the touchpad causes zooming), could you say what OS you're testing on? I can't reproduce it on Linux, but there are known platform differences between how momentum scrolling is handled.
Bug 1703645 Comment 1 Edit History
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I can partially reproduce this on Linux: if I press Ctrl while overscrolled _and with my fingers still on the touchpad_, then: 1. The overscroll gets stuck in that position (no snap-back animation) 2. Further movement on the touchpad causes (reflow) zooming in or out I think (2) is fine in this scenario (it's no different from if you pressed Ctrl while your fingers are still on the touchpad and _not_ overscrolled), but (1) is a clear bug (we should never get stuck in an overscrolled state). --- For the other part of the issue (pressing Ctrl _after_ the fingers have left the touchpad causes zooming), could you say what OS you're testing on? I can't reproduce it on Linux, but there are known platform differences between how momentum scrolling is handled.