`Ctrl+C` takes one minute with empty DB

[ggwpez]

Ctrl+C on a Substrate dev node on master (f0b6e79) takes one minute to exit.
It prints a lot of Proposing failed: Import failed: Cancelled oneshot channel oneshot canceled before finally dying.

^C^C^C^C^C
2022-12-09 15:57:33 🙌 Starting consensus session on top of parent 0x8b9b0b7edcc42230f814b8ba0c865e7f42022d396b4d42e2d49eea5a83a83c73    
2022-12-09 15:57:33 Proposing failed: Import failed: Cancelled oneshot channel oneshot canceled    
2022-12-09 15:57:36 🙌 Starting consensus session on top of parent 0x8b9b0b7edcc42230f814b8ba0c865e7f42022d396b4d42e2d49eea5a83a83c73    
2022-12-09 15:57:36 Proposing failed: Import failed: Cancelled oneshot channel oneshot canceled    
2022-12-09 15:57:39 🙌 Starting consensus session on top of parent 0x8b9b0b7edcc42230f814b8ba0c865e7f42022d396b4d42e2d49eea5a83a83c73    
2022-12-09 15:57:39 Proposing failed: Import failed: Cancelled oneshot channel oneshot canceled    
2022-12-09 15:57:42 🙌 Starting consensus session on top of parent 0x8b9b0b7edcc42230f814b8ba0c865e7f42022d396b4d42e2d49eea5a83a83c73
…

It was just at block 5, so the DB sync cannot take that long.
cc @jasl

[bkchr]

Related to my pr: #12885 :(

But I think I know what it is.

[Polkadot-Forum]

This issue has been mentioned on Polkadot Forum. There might be relevant details there:

https://forum.polkadot.network/t/polkadot-release-analysis-v0-9-36/1529/1