Reproduction steps:
1. Open any project.
2. Create an Asset.
3. Delete the Asset.
4. Check the Recycle Bin.

Actual behavior:
Deleted file is missing.

Expected behavior:
Deleted file is in the Recycle Bin.

Note:
Sometimes, meta file is moved into the Recycle Bin.

Regression introduced in:
5.5

Reproduced with:
5.5.2p2, 5.6.0b11,
Windows 10 Pro.

Not reproducible with:
5.4.5f1,
macOS 10.12.3.