Hi Marks, Yes it is true, Jesus was resurrected a spirit, he was a spirit previously, only spirit beings live in heaven where he returned. He sacrificed his flesh and blood in our behalf. As all spirit beings who interact with humans Jesus did take on physical bodies, but of course not the one he gave in sacrifice, hence why no one recognized him by appearance. We do not teach Jesus took back the sacrifice given in our behalf.
Jesus made a specific point of showing His disciples that He resurrected in the same body He was killed in, complete with the same wounds.
Luke 24:36-43 KJV
36) And as they thus spake, Jesus himself stood in the midst of them, and saith unto them, Peace be unto you.
37) But they were terrified and affrighted, and supposed that they had seen a spirit.
38) And he said unto them, Why are ye troubled? and why do thoughts arise in your hearts?
39)
Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.
40) And when he had thus spoken, he shewed them his hands and his feet.
41) And while they yet believed not for joy, and wondered, he said unto them, Have ye here any meat?
42) And they gave him a piece of a broiled fish, and of an honeycomb.
43) And he took it, and did eat before them.
And the tomb was empty:
Luke 24:1-7 KJV
1) Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.
2) And they found the stone rolled away from the sepulchre.
3) And they entered in, and
found not the body of the Lord Jesus.
4) And it came to pass, as they were much perplexed thereabout, behold, two men stood by them in shining garments:
5) And as they were afraid, and bowed down their faces to the earth, they said unto them,
Why seek ye the living among the dead?
6)
He is not here, but is risen: remember how he spake unto you when he was yet in Galilee,
7) Saying, The Son of man must be delivered into the hands of sinful men, and be crucified, and the third day rise again.
The reason they didn't find Jesus' body in the tomb? Because He was risen, and had gone out from the tomb.
The bodily resurrection of Jesus is established in the Bible, and John declares that to deny that Jesus has come in flesh is antichrist.
Much love!