Members joined via a guest invite have `joined_at: null` in `VOICE_STATE_UPDATE`

[Misha-133]

Description

Members who join a guild voice channel via a guest invite have joined_at set to null, which is either a bug or a silent breaking change as it goes against what's documented for the Guild Member Object.

First mention of this (or an extremely similar) issue seem to be #3152, then it was mentioned in this pr

Steps to Reproduce

• create a guest invite for a voice channel
• join via the invite from an account that is not a member of the guild
• the VOICE_STATE_UPDATE will have "joined_at": null on the member object

Expected Behavior

joined_at having some sort of value, probably the timestamp when user joined the guild/voice channel

Current Behavior

"joined_at": null

Screenshots/Videos

Client and System Information

API v10

[foenichs]

The user never joined the server, so he doesn't have a joined_at value. That seems intentional to me.

[ManHatos]

The issue is that joined_at is not marked as nullable. This may break some apps.

[advaith1]

merged pr #6247 so the docs are now correct. this is unfortunately a breaking change, but this has been live for years and app functionality relies on it, so nothing we can do about that now other than correcting the docs.

[idcult]

🫩