Virtual Editor Flex Child floats to right column

PG Web Editor 5.991, Windows 10 Prof 64 bit.
Screen resolution 4K: 3840 x 2160 with 150% view

Normally: In the Visual Editor I see the Flex Container first, below that is the Flex Child.

That is what I am used to.

When I make this Visual Column wider it spans to 2 columns.
Then I could not find the Flex Grid, would be nice if it would remain below Flex Container
Now Flex Container is found in the left column and Flex Child is in the right column a bit lower on my screen

Making it even wider…: 3 columns: