The following line of code in style.css is causing a spacing inconsistency in the Radio Control:

.components-radio-control {
    display: flex;
    flex-direction: column;
}

The only available example can be found in the Latest Posts Block -> Post Content Settings.

This is what it looks like at the moment (I've colored the bottom margin of the surrounding element with a darker orange):

The expected behavior would be having those two margins overlap each other, but display: flex is impeding that (I couldn't figure out what that flex: display is doing there in the first place).

Removing those lines of code seems to solve the problem without modifying anything else:

• OS: Windows 10 64-bit

• Browser: Firefox [DE], Opera, Chrome

• Version: 70.0b14, 63.0.3368.94, 77.0.3865.120

• Gutenberg 6.6.0

• WordPress 5.2.3