Let's be getting

I don't understand this grammar construction, I've never seen it and I can't find on grammar manuals.
I've seen it on a Japan grammar manual as English translation of a Japan sentence, this one:
"Let's be getting back home now"
I got interested in this obscure and unusual construction.
What does it mean? Which is its grammar meaning?

<"Let's be getting back home now"
I got interested in this obscure and unusual construction.
What does it mean? Which is its grammar meaning? >

Let's leave.
It's time to go.

etc.

It's the present progressive variation of "Let's get back home". "Get back to" means "return to" (the "to" is omitted when used with "home").

I rarely hear people say it that way, but it's heard sometimes.

- Kef