Not sure if you mean just, like, random fall damage out of nowhere, or, 'the item teleports you into midair and then you die of fall damage.' If it's a code issue rather than a design issue, you could simply add an 'override fall distance' function to the dimension swapping code. Even still, there's probably going to be other issues. (Say, if there's a solid wall in the dimension you're trying to teleport into.)
Not sure if you mean just, like, random fall damage out of nowhere, or, 'the item teleports you into midair and then you die of fall damage.' If it's a code issue rather than a design issue, you could simply add an 'override fall distance' function to the dimension swapping code. Even still, there's probably going to be other issues. (Say, if there's a solid wall in the dimension you're trying to teleport into.)