REST /task/query parameter pageSize=10 returns all the tasks.

Description of problem:
Accessing http://localhost:8080/business-central/rest/task/query?language=en-UK&pageSize=5 returns all tasks in the database. If there are 10 then 10 will be in the returned list.

Expected results:
Only the first 5 tasks should be in the returned result.

Additional info:
See attached screenshot which defines pageSize=1.