Using a command with @e [type = ...] shows chalkboard as an option

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

1. Play a world with cheats enabled
2. Open the chat
3. type one of the following: /kill, /tp, /effect etc.
4. 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.