1) What happened

Unloading Asset Bundles on Mac for PC fails

2) How can we reproduce it using the example you attached.

To repro:
1) Open project, select Build target PC
2) Select Editor Menu option Asset Bundles > Build AssetBundles
3) Check in folder to make sure they were actually built
4) Select Editor Menu option Asset Bundles > Build Player
5) Move test_Data folder, player_win.exp, player_win.lib, test.exe to PC, placing them in same folder
6) Start test.exe, observe blue screen indicating blank scene.