Steps to reproduce:
1. Download provided project
2. Build on device
3. Beat the tutorial and Level 1
4. Turn off the game
5. Turn the game back on
6. Press on Level Select (Top right)
7. Notice the amount of time it takes to load

Reproduced on: 5.5.1p3, 5.5.1p4
Not reproduced on: 5.5.0p1, 5.5.1p2
Regression introduced in 5.5.1p3
Project breaks when built on other versions (Tried 5.5.0, 5.5.2, 5.6)

DUT:
Reproduced on:
Google Pixel | Snapdragon 821 | Adreno 530 | Android 7.1.1
Google Nexus 5X | Snapdragon 808 | Adreno 418 | Android 7.1.1
Galaxy S5 Neo | Exynos 7580 | Mali-T720 | Android 6.0.1

Fixed in: 2017.2.0a2
Backported to: 5.5.4p1, 5.6.1p3, 2017.1.0b7

Note: This affected only the load speed of asset bundles that had insane amounts of bundles (10k+).