Amen. No way any official survives another week calling plays like this a catch and fumble in the middle of the field.
If you are seeking a "One size fits all" situation, "Catch" is not a smart place to look.
The current NFHS rule painfully, clearly states: (NFHS 2-4-1) A catch is the act of
establishing player possession of a live ball in flight, and
first contacting the ground inbounds while
maintaining possession of the ball.........".
It might help to consider NFHS 2-34-1: "a ball in player possession is a live ball
held or controlled by a player after it has been handed or snapped to him, or after he has caught or recovered it."
As suggested above, it should be the same conclusion, regarding what YOU have seen whether that specific play is in the EZ or on the 50 YL, and depends entirely on what
YOU have observed in that instance. Did YOU see the player hold or control a live ball in flight, and when he first touched the ground was he "maintaining possession of the ball" when he "first touched inbounds", or not.
If in the EZ, meeting all the above requirements would produce a TD (NFHS 8-1-b) whereas at the 50 yard line, depending on what specifically YOU observed, it could be a catch, and if subsequently dislodged; a fumble. If you judge that the requirements were not satisfied, it is an incomplete pass, in either scenario.
There's no vote, no poll, no situational significance, it all depends on what
YOU believe YOU actually saw, and whether YOU judge all the requirements were met, or not met.
I would suggest the meaning of "maintain" relates only to continuing possession of the ball through "first touching the ground, inbounds", and is not dependent on any subsequent actions. (But that's just my understanding, YOU have to arrive at your own understanding of the NFHS rule).
As Ralph points out, guidance on pg 80 of the Officials Manual, when
in doubt if ALL the requirements were fully satisfied, "No catch", which is totally dependent on what specifically YOU have observed in this
specific instance.