The Composable Finance team has had the same issue essentially as on Picasso chain on Kusama, so one particular cause: The team had a stray todo! in the weight calculations for pallet-democracy which doomed the chain to be bricked once the launch period elapses.
Public wasm file to use can be found here: https://github.com/ComposableFi/composable/releases/tag/v2.1.2
Preimage design:
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