La Release note est la pour ça
Reason 11.3.2 Release Notes
Reason Rack Plugin for AAX is now available as "Effect" as well, under various effect submenus. With RRP Effect, the empty rack shows the most used effect devices, for quick access.
Added Remote files for Novation Launchkey mk3 series.
Browsing for Default Song Template in the Preferences will now open a regular OS file browser.
It's now possible to create a Player in a new rack by dragging and dropping it onto a rack divider.
Fixed a bug where aftertouch wasn't recognized from Arturia Keystep
Fixed a bug where PDC didn't adjust properly when exporting at a different sample rate.
Fixed a bug where the Sample Editor couldn't be used with some Rack Extensions.
Fixed a bug where Reason Rack Plugin could crash when using non-QWERTY keyboard layouts.
Fixed a bug where download of Optional Content could fail under MacOS Catalina.
Fixed a bug in RRP AU, where all MIDI CC from the MIDI Out Device defaulted to zero upon loading a document. This could cause silence since Volume, Expression and others were set to zero.
Fixed a bug with pattern devices in RRP, where automation of pattern selection would skip certain patterns.
Fixed a bug where the Save and Export dialogs didn't behave correctly.
Fixed a bug where recording could result in extremely short note lengths (due to double instances of keyboards in the preferences).
Fixed a bug where using Search in the MacOS file dialog would hang the dialog.
Improved compatibility with Vienna Symphonic Library, Waves and other plugins.
Fixed a bug where using Pitch Bend, Mod Wheel, etc would fill up the Undo History in Logic.
Fixed a bug where updating Rack Extension licenses could stall Reason Rack Plugin.
Fixed shutdown problems with RRP.
Fixed so that Reason does not crash if a VST crashes during scanning