I don't know if the bug has already been discovered, but I'm announcing it anyway.I noticed that the bug works before the pre release 3 (I tested until 1.14.4 so check in the previous versions).
I just discovered a bug in the netherworld or a lava lake in the overworld.
When you place a block in the lava and place a new one underneath it and then when you break the block and press the jump button you can see through the lava.
So we can potentially find a lot of netherite.

Thanks for looking at my bug report.

(English is not my native language if there are any mistakes please tell me! )