Two odd lines under Melbourne

The other day i was flying from Melbourne to Hobart in an A220-300 and in the map there are 2 lines over the Bass straight.
No AP+ or any connectivity issues.

Can someone tell we what the purpose behind these lines is?

(Flight was done in the official IF app not in the Beta app)

Maybe it’s a boundary line separating Tasmania?? (not sure why that would be there though in that case)…

It’s there in the Beta version as well…

@BennyBoy_Alpha is correct.

They are State Lines according to staff post back in 2020.

But why are they only there and why do they have a gap in between them?

That’s often just how “sea boundaries” are marked.