Referenda proposal not moving to confirming automatically

[crystalin]

Is there an existing issue?

• I have searched the existing issues

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• This is not a support question.

Description of bug

We had a proposal that people voted for and had enough vote/support to pass at a future time.
Once that time was reached, the referendum stayed in "deciding", and I also saw the scheduler being triggered earlier (by the alarm if I understood correctly).
12h later, I decided to try to vote again (with insignificant amount) and it passed it to "confirming".

Is that expected ?
I thought the alarm system was there to trigger the change when the threshold was supposed to be reached

(Also, there might have been some conviction vote delegation removed after the last vote was done during the deciding period which might be the reason the alarm didn't do anything once executed)

Steps to reproduce

No response

[bkchr]

CC @kianenigma @ggwpez

[gavofyork]

Possibly fixed by paritytech/substrate#13704

[kianenigma]

Possibly fixed by paritytech/substrate#13704

any confirmation on this?

[crystalin]

@kianenigma We didn't upgrade yet (probably another 2 months before this fix reaches prod), but the issue happened again today:

on Moonriver (Kusama) https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Fwss.moonriver.moonbeam.network#/referenda

{
  Ongoing: {
    track: 0
    origin: {
      system: Root
    }
    proposal: {
      Lookup: {
        hash_: 0x31b4bd6249363c0ace1bef13719d2f3b531c95ff883209ff96dbe78cb41eaf96
        len: 188
      }
    }
    enactment: {
      After: 100
    }
    submitted: 3,867,858
    submissionDeposit: {
      who: 0x381d106C440F92654827D2B2c637Dd5B38A362A7
      amount: 10,000,000,000,000,000,000
    }
    decisionDeposit: {
      who: 0x381d106C440F92654827D2B2c637Dd5B38A362A7
      amount: 100,000,000,000,000,000,000,000
    }
    deciding: {
      since: 3,875,058
      confirming: null
    }
    tally: {
      ayes: 92,537,936,792,079,023,742,502
      nays: 89,000,100,000,000,000,000
      support: 63,219,232,282,079,023,742,502
    }
    inQueue: false
    alarm: null
  }
}

(The referenda passed the required 0.5% support some blocks before the end, but stayed in deciding)

I'm going to vote for it now to see if it moves

[crystalin]

And it moved to confirming voting with 1 token: