When typing "@e[type=", the command suggestion shows a list of entities that contains disabled entities by disabled vanilla data packs.

Steps to reproduce (As shown in following screenshots):

1. Create a new world and don't enable experiments. (Here I have "Update 1.21" disabled, which also means that I can't enable "update_1_21" data pack using commands in game.)
2. Type in a command that need entity as a parameter (e.g. "/summon"), and in command suggestion there are no disabled entities (in "update_1_21" data pack).
3. Type in a command that need a target selector as a parameter (e.g. "/kill"), then type in "@e[type=" to get a list of entities. Now this list contains "minecraft:ominous_item_spawner", which is an entity disabled by not enabling the "Update 1.21" experiment.