System Information
Operating system: Any
Graphics card: Any

Blender Version
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (newest version of Blender that worked as expected)

Short description of error

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

That seem like Blender not packing Animated textures, and this is not an issue about file size, as it can pack very large textures, but a small animated file.

Best,
Ed