System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19
Blender Version
Broken: version: 2.83 (sub 5), branch: master, commit date: 2020-02-25 18:52, hash: rBc05d83bc7632
Worked: blender-2.83-d95e9c7cf80a
Short description of error
No alpha channel when bloom is on in render and viewport preview.
Exact steps for others to reproduce the error
In default scene check film - transparent, viewport shading - render preview and then turn on bloom. Rendering (F12) is also broken.