Twrp 2870

Is it a new version? A specific phone model?

Elimination of the need to use volume keys and power buttons to navigate menus.

File system compatibility was expanded, making it easier to read external microSD cards formatted to modern standards. The Anatomy of the TWRP Interface

was a major release in the 2.x series, designed to handle the stricter system partition requirements introduced by Android 5.0 Lollipop. Key Features and Improvements in TWRP 2870

You cannot install TWRP on a locked device.