Once a nether portal is created and a player enters and subsequently leaves the nether, if you dismantle the portal in the overworld and make another portal somewhat near the original portals location, the player can then enter the nether through the portal at the new location. However, when that player leaves the nether, a new nether portal will be generated in the overworld at a location near where the first portal was located. I did not have any crashes prior to this issue, and having tested this several times it works every single time but will then cause a crash moments after returning to the overworld.
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Ok, the original portal was located at 174 64-1643, I then moved the portal in the overworld to 67 72 -1643. After a trip to the nether it spawned another portal at 196 62 -1626.

We need the coordinates of the portal in the nether too. And also to be clear, when you returned from the nether to the overworld a portal was actually created at the location you teleported to, correct?

The Nether portal must be around 24 Y -203, and that's within range of all 3 of the overworld portals mentioned.

The X coordinate of the Nether portal must be >= 25, which is within range to return to X = 174 or X=196, but not to return to X=67. An Overworld portal at X=67 can send to a Nether portal at -120 <= X <= 136.
Note that when returning from nether to overworld if there is not a portal within 128 blocks of the calculated coordinates (multiply nether X & Z by 8 for overworld location) it will create a new one. If you still think there is a bug please provide coordinates for all of the portals.