With this CL landed: https://chromium-review.googlesource.com/c/chromium/src/+/598994, we are changing the behavior of touch action filter. Basically when the real touch action is unknown, we accumulate the scroll delta and apply it later. However, we only apply that when there is a similar event later on. We should make sure that when the accumulated value is allowed by the real touch action, we emit another similar event even if there is no such an event coming.