Source: http://forums.trovegame.com/showthread.php?144072-PTS-Patch-Notes-4-1-2020

Additional Updates

• Fixed an issue that was causing minions to deal no damage in some Delves.
• Mastery after 500 now gives 1 Magic Find and 1 Power Rank per level.
• The soul rewards that can be earned in delves have been tripled to match the old rewards for shadow day with patron active. 5 Despoiled Divinity can now be earned per week, up from 3.
• The messaging for losing magic find is now better if you lose exactly 1 magic find.
• Weird Fisheye can now be fished from the Shadow Tower Lobby.
• Fixed an issue that could cause sound to cut out when too many audio events were happening.
• Increased the drop rate for gear from enemies in the delve paths.