Before rotating red object the interpolated shapes has roughly the same scale as the original blend shapes:
After rotating the red object by 180deg the interpolated shapes have their scale changed:
Expected result - notice the red object is rotated 180deg, but the blend maintains the size of interpolated shapes:
Tested with build: https://d13f5c46.graphite.pages.dev/ on Chromium Version 142.0.7444.175 (Official Build) built on Debian GNU/Linux 13 (trixie) (64-bit)