We've added quite a number of RED50 patches to 9.004 [1]. Hence, I'd recommend everybody participating in the RED50 beta test to update to 9.004.
Don't forget to remove /etc/red_version_red50 in case you've forced a specific RED50 firmware version.
Thanks,
Helmut
[1] https://community.sophos.com/products/unified-threat-management/astaroorg/f/52/t/28637