A short description of the issue:
While using the mediaItems.search API if we do not pass any "pageSize" attribute, all photos are returned as expected. However, if we pass a "pageSize" then the number is halved. E.g. passing 30 returns 15 results, 20 returns 10 and 10 returns 5.

The calls to the API that lead to the error. Include the sequence of calls, including request headers and body.
Do not include any personal information, authentication secrets, media item or album IDs.
https://photoslibrary.googleapis.com/v1/mediaItems:search

What steps will reproduce the problem?
1. Call the https://photoslibrary.googleapis.com/v1/mediaItems:search API with no pageSize parameter specified. The correct set of photos is returned.
2. Now call https://photoslibrary.googleapis.com/v1/mediaItems:search with a pageSize set to a value such as 50. Half that number of photos, i.e. 25 are returned.
3. Looking for photos within an album doesn't display this issue.
4. This can be tested out in the "Try this API" section as well.

What is the expected output? What do you see instead? If you see error messages, please provide them.
The "pageSize" value should be respected for the mediaItems.search API instead of showing half of the photos.

Please provide any additional information below.