This Request is related to a issue I had when pasting in farms...

When a Liquid is placed before a block next to it, it will flow in place of that block and prevent it from being pasted into the world, this makes large scale farms break a lot of the time when being pasted in...

A simple solution to this would be to place liquids like lava and water at the end of the paste operation instead of throughout it.

This would help a lot!
And Thanks In Advance...

Multi-pass pasting may get added at some point. But in most cases you can avoid or at least lessen this problem with liquids by using the paste block replace behavior With non-air instead of None (Ctrl + M to cycle it, or change it in the Generic configs).