Something else to consider - John the Baptist was Elijah. He even dressed the same way, and I believe had a similar diet. However, John the Baptist did not know he was Elijah, because when someone asked him; he said I am not. However, Yahushua said he was Elijah.
So can the Almighty send a soul back on earth, but with its memory erased? Scripture seems to indicate this is the case. It’s not a very strong case, but I don’t think we are meant to understand everything. And that’s okay.
I believe that Yeshua was indicating that John the baptist had the
spirit of Elijah.
Luk 1:12 And when Zacharias saw him, he was troubled, and fear fell upon him.
Luk 1:13 But the angel said unto him, Fear not, Zacharias: for thy prayer is heard; and thy wife Elisabeth shall bear thee a son, and thou shalt call his name John.
...
Luk 1:16 And many of the children of Israel shall he turn to the Lord their God.
Luk 1:17 And he shall go before him
in the spirit and power of Elias, to turn the hearts of the fathers to the children, and the disobedient to the wisdom of the just; to make ready a people prepared for the Lord.
Here In Mathew 17, Yeshua was saying that he WILL COME and that he HAS CAME.
We know that John fulfilled verse 12 of Matthew 17 but it is not clear who will fulfill verse 11. I believe it will be Elijah himself but it could be another that comes in the spirit of Elijah.
Mat 17:10 And his disciples asked him, saying, Why then say the scribes that Elias must first come?
Mat 17:11 And Jesus answered and said unto them, Elias truly
shall first come, and restore all things.
Mat 17:12 But I say unto you, That
Elias is come already, and they knew him not, but have done unto him whatsoever they listed. Likewise shall also the Son of man suffer of them.
Mat 17:13 Then the disciples understood that he spake unto them of John the Baptist.