I'll place this response here as
@crossref wishes to conflate 2 different scenarios and appears unwilling to accept them as distinct and separate.
I saw no reason to discuss this further as
@Stu10 had provided what was to me a very well reasoned discussion in Post 12 and reiterated within Post 14 that a knock on had not occurred.
And that whilst some may feel that there is scope for discussion in Law 11.3 I am supportive of
@Stu10's perspective, hence my "Like".
If you also look at possession, he was attempting to bring it under control and it did not touch the ground or another player before the original player caught it.
- Knock-on: When a player loses possession of the ball and it goes forward, or when a player hits the ball forward with the hand or arm, or when the ball hits the hand or arm and goes forward, and the ball touches the ground or another player before the original player can catch it.
- Possession: An individual or team in control of the ball or who are attempting to bring it under control.
Furthermore, we may find that clarification is sought for interpretation of those particular laws but currently I find a level of awareness, skill, speed of thought and reaction that we should be encouraging in the game and therefore have no issue with it.
However, at the risk of cross posting myself, I would much prefer the resources to be focussed on a scrupulous review and clarification of the extremely dangerous and fully supported jumping to catch a ball that allows reckless players to endanger themselves and others with impunity.