Main features:

1. User scenarios

Users can now create their own scenarios (scenes) in the mobile application using a specially prepared addition wizard. To use scenarios, update your Yubii application to version 1.21.

What's new:

Devices
    Added support for REMOTEC ZXT800 device.
    Added support for Heatit Z-TRM6 device.
    Added support for MCOHome Keypad Switch K-ES2 device.
    Added support for MCOHome OS11 and OS12 presence sensors.
    Added support for devices in Z-Wave 3.0 engine**:
        FGD-211
        FGS-221
        FGR-221
        FGS-211
        FGBS-321
        FGWPE-102
        FGWPI-121
    Removed redundant slat control for blind types that do not have such functionality.

Elero*
    Added support for old versions of RolTop blind drives.

Gateway connection
    Moved the central selection from advanced settings directly to the Z-Wave device addition screen.

Other
    Improved the operation of system notifications by updating their data according to the current system settings (room names, language, etc.).
    Introduced system optimizations to improve the performance of the hubs.
    Updated WLAN firmware.

Plugins
    Added support for Satel Integra 256.

Scenes
    Hidden the "True for a specified time" option for event-based conditions and triggers.
    Added a new look for the email's template sent from the block scenes.
    Improved the toggle action (on/off) of the Unio-868 device.

Z-Wave
    Improved the process of adding Schlage BE369 device.**
    Enhanced communication during high network load and eliminated the "freezing" rare phenomenon of the Z-Wave engine.**

Bug Fixes:

Backup
    Fixed an issue displaying the login screen after creating a backup.
    Resolved issue of redundant hub restart when creating a backup.

Climate
    Fixed the offset between cooling and heating values for Fahrenheit units.

Devices
    Fixed reconfiguration operation for Heatit ZTERM3 device.
    Minor stylistic fixes for slider displays.
    Improved operation of Unio 868 device with inverted logic option enabled.
    Fixed setting favorite colors for RGBW Linked Device.
    Fixed temperature and humidity hysteresis ranges in Linked Devices.
    Fixed an issue with restoring default parameters for Domii Climatic sensor after system restart.
    Fixed marking Domii climatic sensor (solar) as dead after central unit restart or update.
    Fixed 502 error when adding Elero devices.

Gateway connection
    Improved network operation and DNS handling when linking hubs.

Nice*
    Fixed an issue where devices paired with BiDi remote authorization using one channel do not respond until the hub is restarted.

Other
    Restricted Installer permissions for changes in the access settings.
    Fixed rounding values in Fahrenheit units for freeze and fire notifications.
    Improved the display of notification timestamps in the notification panel.
    Minor stylistic improvements to modal windows, user password reset email template, side menu buttons, and translations display.
    Fixed tariff display in the Energy panel for Brazilian, Portuguese and US English languages.
    Improved device removal from the mobile application for Z-Wave 3.0**.
    Improved Wi-Fi network stability for HC3L and YH hubs.

Plugins
    Removed the DSC plugin due to incompatibility.
    Fixed connection error for Heos plugin.
    Minor translations fixes for Tedee plugin.

Quick Apps
    Fixed error reporting in fibaro.setTimeout function.
    Improved selective clearing of the debug console.
    Fixed an issue with sending emails about suspicious login attempts with incorrect authorization in Quick App.
    Fixed background color for Quick App in dark mode.

Scenes
    Fixes for running  LUA scenes.
    Improved display of CO sensor statuses when selecting triggers in block scenes.
    Fixed the error of deleting a scene that uses global variables.
    Fixed time value conversion in sunrise and sunset-related conditions in block scenes.
    
Users
    Improved display of statuses on the user list when inviting Remote Access users.
    Solved the issue of deleting user permissions for rooms after creating a new section.

Z-Wave
    Resolved issue with incorrect display of Z-Wave parameter values for HC3L central unit.
    Improved the display of the number of queued parameters for Z-Wave devices.
    Improved temperature setting actions for thermostats in relation to the precision supported by devices.
    Improved templates for Qubino 3-Phase/1-Phase Meter meters.
    Improved display of scales for some Qubino device endpoints.**
    Improved display of power consumption and energy for Qubino device.
    Fixed issue with adding old-generation Z-wave+ devices.**
    Fixed issue of inability to control some blinds from other manufacturers.

Known issues:

Z-Wave Engine 3.0
    Some Z-Wave devices are not fully compatible with the new version of Z-Wave engine.

* - Does not apply to HC3L (Home Center 3 Lite).
** - Applies only to Z-Wave 3.0 engine.