for some reason you can make candles float in midair in the new 20w45a snapshot (at least in java havent tested in bedrock) the following video shows the bug https://youtu.be/pLo8U7EfYfE hopefully you guys can solve this!
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Hey, in this snapshot candles apparently act like a full block, which is why they may appear as if they are floating. This issue is currently being tracked in MC-203572.