This is another case of a 2500++ rated puzzle. It is an easy Mate-in-2 puzzle which I solved in 5 seconds. This obviously shows that this puzzle is worth much less than 2500.
Tactics don't correspond to their rating

Tactics are treated just like players. The get their rating based on member's solving them and go through the rating algorithm.
So, if a puzzle has a high rating, that generally means a lot of people have missed it, so it has gained a lot of points. If it is low, it is due to a lot of players successfully solving it.
There are a few places where that isn't as true. Some puzzles give partial credit, so the rating may be lower than it would otherwise be, due to a lot of people getting the partial credit. Some also only give credit for the full solution, and a lot of people might miss a late move in the line.
Finally, some tactics get modified after they have been through the process, sometimes to remove alternate lines, and that could make it easier than it's rating would suggest.
You have your own ratings per type of the problem as well. Your "mate in 2" sight might be for example 2200, but then your "discovered attack" sight might be 1900 , ect.
Thats why coaches are good, because they can plot your own ratings for chess generally and make you work specifically on your weaknesses.
This is Puzzle #983986.
I got it wrong. And I was surprised to see that it's only rated 1800! With a target time of 0:09! I'm completely dumbfounded, because the solution didn't seem obvious to me, although it might be poor judgement on my part.
But I have come across many puzzles with a rating of 1800, yet they don't seem like 1800 standards! Not only this, I have successfully completed many puzzles with a minimum rating of 2200++ which were very easy. Can Chess.com look into this and make sure that the rating of the puzzles are more accurate in the future?