I have discovered that when using a command with @e with [type = ...] chalkboard (an item from Education edition) appears as an option. The variant with Minecraft: prefix exists as well.
Steps to reproduce
- Play a world with cheats enabled
- Open the chat
- type one of the following: /kill, /tp, /effect etc.
- chalkboard appears as one of the possible targets. You can type Minecraft: to see the variant with Minecraft: prefix
Expected result: when using a command with @e [type = ...] chalkboard should not exist.
Observed result: when using a command with @e [type = ...] chalkboard does exist.