How to reproduce:
1. Open the project "case_1139189-TexStreamTest" and scene "SampleScene"
2. Enter Play Mode
3. Observe the Game View

Expected result: the textures used on the "woodenBoard1" and "FireEscapeDoor" GameObjects are high resolution
Actual result: "woodenBoard1" and "FireEscapeDoor" GameObjects have smaller than optimal textures streamed in even though the texture budget would allow it (the percentage of space used can be seen in the texture streaming summary in the Game View)

Reproducible with: 2018.3.10f1, 2019.1.0b9, 2019.2.0a10
Could not test with: 2017.4.24f1 (no texture streaming), 2018.3.0a5 (the repro project's prefabs break due to unavailability of nested prefabs)

Note: the objects which have a scale smaller than one have mipmaps streamed that are smaller than optimal. This results in blurry textures even though there is still texture budget available. As such the GameObject with a scale of 1 in all axes does not suffer from this problem