The bug
When flowing water is above magma blocks it'll turn into water source blocks making it impossible to have flowing water on magma blocks (quite a big deal for farms).
How to reproduce
Fill an area with magma blocks and drop a single bucket on top, the entire surface of the magma blocks will be covered in source blocks.
Linked issues
is duplicated by 1
Attachments
Comments 4
Can also reproduce.
The white concrete block in the images I attached is the location of the only source block I placed.
Can reproduce