Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2080 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.50
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-06-29 21:12, hash: rBf28e59bd742e
Worked: blender-2.90.0-e079bf6996fc-windows64 (Don't know the exact build where it last worked. But it worked in this few weeks old build.)
Short description of error
Generated Texture Coordinate Node doesn't keep the UVs in animated mesh. This only happens with Eevee/Material preview (works with cycles).
Exact steps for others to reproduce the error
Open above blend-file.
Put Rendered mode on to the left window.
Play animation and see the difference between Cycles and Material preview.
Or change render engine between Cycles/Eevee while the animation is playing to see the difference.