WHAT THE HECK DID THEY DO TO THE LANDSCAPING TOOLS IN UE5??!?!!!?!?1?!?

Back in UE4, landscaping tools used to be so simple.
Sculpt = bring landscape up.
Smooth = smoothen out landscape between two different heights
Flatten = bring landscape to the height of the landscape that was under the cursor when clicked

In UE5 it’s a complete clusterduck.
Sculpt is still fine.
Smooth has become completely unpredictable.
Flatten is doing God knows what.

Is this a bug or intended functionality!??!!?