/forceload doesn't load entities instantly anymore

 In 1.16.5 and below it was possible to run /forceload and then in the same tick interact with the loaded entities. This is no longer the case, likely because entities are not part of region files anymore.

What I expected to happen was:

When I run /forceload on a chunk and then in the same tick use a selector, entities in the chunk should be able to be selected.

What actually happened was:

The entity was not present when for example running /say @e

 
Steps to Reproduce:

1. Create a new redstone ready superflat world.
2. Teleport to 1000 56 0 and place an armor stand for example
3. Teleport back to 0 56 0 and place command blocks in a chain with the following commands:
   forceload add 1000 0
   say @e[type=armor_stand]
   forceload remove 1000 0
4. In 1.16.5, the output is "[@] Armor Stand". In 1.17, the output is "[@]".