Let me repeat, we don't know what the puzzle is, because black's leading move is missing. It is a mate in 2 IF BLACK PASSES.
The easiest 3000 rated puzzle.
In this puzzle, it is NOT white to move. If you see the FEN notation of the problem you'll see that:
FEN: r1bq1bnr/1ppk1B2/p1np3p/6N1/3PP3/2N3p1/PPP4P/R1BQ1RK1 b - - 0 1
-------------------------------------------------------------------------^ Black to move
https://www.chess.com/puzzles/problem/375359
Even after Black moves hxg5, the continuation is the same.
Only if Black plays hxg5. Black has alternatives.
what if he plays Nf6 .There is no mate then.
I can confirm that puzzle is mate in 2 from my history. the puzzle number is 0375 359. and the link is here.
https://www.chess.com/puzzles/problem/375359
I agreed that the turn is wrong, and black might have played "a5, b5" or something. But the solution is the same, mate in 2.

Okay. The puzzle should find its true rating in the mean time few lucky people can gain easy rating points.
Here you are guys, two more near 3000-rated mate in 2 puzzles. No way does this make sense!
https://www.chess.com/puzzles/problem/134601
https://www.chess.com/puzzles/problem/35098
(I also confirmed that the OP puzzle does indeed start hxg5).
Here you are guys, two more near 3000-rated mate in 2 puzzles. No way does this make sense!
https://www.chess.com/puzzles/problem/134601
https://www.chess.com/puzzles/problem/35098
(I confirmed that the first one does indeed start hxg5).
I dont think they are mate in 2. Those are my thinking, better to recheck with stockfish,
First puzzle, Black must move d6, then mate in 2. The solution is 1........d6, Qh5+ 2. Ke7 Qf7+# . Otherwise it is mate in 6. 1. Qh5+ Ke7 2. Qf7+ Kd6 3. Nc4+ Kc5 4. Qd5+Kb4 5. a3+ ka4 6. b3#
Second puzzle. No forced mate solution in 10 or 20 moves. White must move kt to somewhere like Nh4, or Nh2, then it is mate in 2. Solution is 1. Nh4 Bg3+ 2. Kd2 Qxd4#
I hope this copy-paste-work works:
https://www.chess.com/puzzles/problem/35098
https://www.chess.com/puzzles/problem/134601
https://www.chess.com/puzzles/problem/375359
and here is on more Puzzle rated ~2200 / Mate in 1:
https://www.chess.com/puzzles/problem/185142
Here you are guys, two more near 3000-rated mate in 2 puzzles. No way does this make sense!
https://www.chess.com/puzzles/problem/134601
https://www.chess.com/puzzles/problem/35098
(I confirmed that the first one does indeed start hxg5).
I dont think they are mate in 2. Those are my thinking, better to recheck with stockfish,
First puzzle, Black must move d6, then mate in 2. The solution is 1........d6, Qh5+ 2. Ke7 Qf7+# . Otherwise it is mate in 6. 1. Qh5+ Ke7 2. Qf7+ Kd6 3. Nc4+ Kc5 4. Qd5+Kb4 5. a3+ ka4 6. b3#
Second puzzle. No forced mate solution in 10 or 20 moves. White must move kt to somewhere like Nh4, or Nh2, then it is mate in 2. Solution is 1. Nh4 Bg3+ 2. Kd2 Qxd4#
I am surprised to need to point out that you can't see the opponent's move in the links I posted, so you can't actually solve this. There is no link that does show this. I have complained to chess.com about this broken functionality.
Anyhow, I assure you that, like the OP puzzle with hxg5 as the first move, these two are mates in two rated near 3000. Here they are in full:
Move 1 was pretty intuitive.
Move 2 there was a lot of temptation to play either Bxg5+ or Qxg5+
I'm guessing of the 80% that got the problem wrong, the vast majority got move 1 correct but then got move 2 wrong.
I am sure most of those 80% are not rated above 2000 in tactics,.As you said there is some problem in the statistics,this puzzle should be reported.