Accidental scroll jumps because of bubble width touch area on whole height

[tschweitzer]

It seems that while the bubble is visible the whole vertical area (pink rectangle on screenshot) is tappable and when tapping in that area (pink circle on the screenshot) the bubble jumps to that position and with that scrolls far away from the current position.

The wider the bubble is the wider is that tappable area and accidental jumps happen easy. Would it be possible to only allow dragging the bubble (green rectangle area on screenshot) instead of making the whole vertical area tappable?