Operating system: Windows 10
Graphics card: Radeon 580 Pro
Broken: Latest 2.91 Alpha @ 23 sept
Short description of error
Since the latest Alpha version of Blender. Eevee can now render bloom on transparency. There was a bug yesterday, that got fixed. Now the Viewport is showing the bloom on transparancy, but when saved to a PNGA, it doenst show the bloom anymore.
Exact steps for others to reproduce the error
Render any image on transparency background, with bloom that covers the transparency. Save as a PNG
See Blender File attached