Duplicate VST3 UID

I want to provide multiple effects from a single bundle, but I’m running into a problem. REAPER will only show both plugins if I enable the dodgy “duplicate VST3 UID” setting:

So, obviously I’ve done something wrong, but I can’t tell where. The Processor/Controller IDs for my two effects are distinct - here’s what shows up in VST3PluginTestHost:

Any idea what’s going on? I have another package with three effects in it, and that one works fine, so I’m a bit confused. :sweat_smile:

Maybe another VST3 has any of this UID already. How did you generate yours?