The event looks like it is a force push (also know as new revision) of an existing proposal so it isn't displayed in proposal lists.
The reference to the original proposal is actually a reference to a kind 1 event and there isn't an original proposal therefore it doesn't get displayed.
This is a result of a bug in the latest vesion of ngit (v1.1.2) when running the command `ngit send` with the `--in-reply-to` flag.
I'll close this issue. The bug in ngit list is tracked through:
nostr:nevent1qqs0uwwmd05tu6jqcjd55k5he6tvsxlu2xxstd3xnykr2504n3t2qvslvnhqc
https://gitworkshop.dev/repo/ngit/issue/fe39db6be8be6a40c49b4a5a97ce96c81bfc518d05b626992c3551f59c56a032