Replicas dont match primaries

UV replicas go to primary’s coods but dont rescale.
If its not possible to rescale replicas, how should i stack uv islands? Primary island become bigger than replica after repacking only solo and primaries islands.
And also can i somehow lock scales of uv islands so they dont rescale when i pack it?

UPD: Solved it!

Still interested if i can lock the scales of islands so they dont rescale with packing