How to reproduce:

1. Repeat the following command to summon some entities. (entity type does not matter)
   Execute the following command (spam):

   /summon zombie

1. The purpose of this command is to add tags to some entities.（can be added for more entities)
   Execute the following command:

   /tag @s add 1

1. Execute the following command:

   /tag @e remove 1

Expected result:

Removed tag '1' from 7 entites
(i summoned 7 zombie)

Observed result:

Removed tag '1' from _447 (my name)
(Displays the name of the entity from which the tags was removed when the tags was removed from only 1 entity， More entities will show the number of entities with removed tags instead of all entities)