Unreal 4.24 Blueprint Landscape Brushes are 8 bit for some reason?

[Slavq]

@3dev

render targets used to apply the height map to the landscape are in RGBA 8 bit format which causes stepping in the application of those height maps if the height is raised too much

This is the issue, still present in UE5.
Changing the internal RT to 16bit causes it to not render at all.
This issue prevents us from creating custom brushes (with custom detailed heightmap).