I was playing on the Trial version of 1.16.2, and I found that weird bits of grass will generate floating above pools of water. I know this has been resolved in a similar case, but it did come back. At Least in the trial version.
These occur over most of the water pools. I am not sure if the issue is with lava pools, though.
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Hi there!
This looks like a duplicate of MC-610.

Then how is it happening in 1.16.2 if that was in 1.4.2
Hello!
The bug was first discovered in 1.4.2 and is still present in 1.16.2 (if you check the affected versions of that ticket, you'll see that 1.16.2 is listed).

Alright. Thought it was patched 8 years ago. :/
Nope, I don't think so. (But I wish it was!)