@dhananjay_vichare It looks like the new Perspective theming updates were pushed to 8.0.13. 8.0.12 was expedited in order to push out a critical patch.
No nightly updates for today, although we did expedite 8.0.12 early to patch a critical issue. Support Portal News
8.0.12 final only contains a fix for the UDT issue we identified in 8.0.11. All other changes and features that were originally targeting 8.0.12 are now targeting 8.0.13.