On May 24, Valve released a mini-update for Dota 2 aimed at fixing bugs that appeared after the release of patch 7.39 Spring Forward. The update refined Immortal items, fixed bugs related to heroes and their abilities, and improved the user interface.

List of changes:

• New Immortal items can now be equipped as ability effects
• Multiple interface fixes
• Fixed item rarities from the new treasure
• Luna: fixed visual attack effects when using the Seeker of the Crescent Wheel set
• Void Spirit: fixed the Sanctuary aspect that incorrectly displayed absorbed damage
• Batrider: fixed the turn rate slow value from Sticky Napalm
• Naga Siren: Reel In ability added to Ability Draft
• Shadow Fiend: fixed soul count display
• Io and Batrider: partially fixed a bug that allowed enemies to see their location on the map
• Fixed an issue where ALT-clicking on any hero aspect did not reveal additional information

On May 23, patch 7.39 Spring Forward was released in Dota 2, where developers updated gameplay, revamped the interface, expanded the settings menu, and changed the map. More details about the update can be found at this link.