Entities spawns will no longer match magic mobs based on display name. This is too exploitable, unfortunately. Please see the builtin spawn eggs and spawners to see how to put the correct data tags on. If you need this feature, perhaps due to existing spawners or eggs that can't be updated, use /mconfig config match_magic_mobs_by_name true
Shulker boxes destroyed by magic will not drop their contents
The /mmob command can be used by entities (because I guess that's a thing??)
Additions
Added target_block parameter to CheckInventory action, to allow searching container inventories
Added player_weather: true option to Weather action, for player-specific weather
Added airtide, a Trident with riptide that makes local rain when you hold it