Vines can generate floating in midair in jungles, swamps, and mangrove swamps. I think this was previously part of MC-610 before it was fixed.
1.17 seed and coords:247 113 3
5082304168952573072
Swamp example-560 63 -978
-30179096521967669
Note that you must fly to these coordinates, as teleporting will not work.
Also note that reproduction is not always consistent. If these vines don't appear for you, keep looking throughout the nearby jungle.
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Cannot reproduce.

Cannot reproduce

able to reproduce on 1.17- rc1
Teleporting to this location had also made the floating vines appear in surrounding areas

Can confirm in 1.17.
Can confirm in 1.17.1.
Seed: -7090047633471018246
Coordinates: /execute in minecraft:overworld run tp @s -27199.35 68.00 4683.70 -138.47 20.62
Can confirm this behavior in 21w38a.
[media]Seed: 5577082629219222156
Coordinates: /execute in minecraft:overworld run tp @s -236.70 72.00 -18.23 -146.50 -21.33

Can confirm in 21w39a.
Just to make it crystal clear, this also now affects vines generating within mangrove swamps.

Can confirm 22w14a.

In 22w17a.

In 1.19 Pre-1

Can confirm in 1.19.3