Bloom does not render

The bloom effect (Scene/Colours/Bloom Intensity and Radius) seems to show up in the viewports (both default and render) but when the image sequence is rendered there is no bloom. Attached image shows viewport on Embergen 7.5.4 with bloom and external read - no bloom. I’m assuming this is a bug - or is there an obscure setting somewhere I’m missing?

Just to check this I put the bloom way up in Embergen and rendered it - definitely no bloom in rendered images

This is a known issue. Hopefully we can have a solution in the future, but we’ve never been able to render bloom due to not having proper alpha channels for it.