Still affects 22.214.171.124 beta
What should generate:
Some parts of the swamp biome generates typical one-block deep lakes in swamp, often covered with lily pads
What happens instead:
Only the bigger lakes and flat terrain without those lakes generate.
How to reproduce:
Enter the seed 1411648432 and tp to 183-63-0.
In older versions it shows the one-block deep lakes, but in 1.2 +, it generate flatland with no small lakes instead.
Thus on 1.2 + onward it do not generate.
Extra info to reproduce:
In 1.7.2 on Java they were removed, and added back in a snapshot of 1.8, but on bedrock edition it is not stated in a change log of a beta that it was removed, thus I think it must be a bug.
Checked 1.0 +, was also affected.