Missing field "pending" in Guild Member Update

[AsianIntel]

Description
Some GUILD_MEMBER_UPDATE events do not seem to include the pending field.

Steps to reproduce
The pending field is missing when any user changes their avatar/profile picture (from my debugging at least)

Expected Behavior
The pending field should be included as per #2396 (comment)

Current Behavior
The pending field doesn't get included

Log received from the gateway:
{"t":"GUILD_MEMBER_UPDATE","s":100,"op":0,"d":{"user":{"username":"...","public_flags":64,"id":"331804882837176322","discriminator":"1122","avatar":"a_684331f516e9a0aa3 012ce06eab866a2"},"roles":["665325651728793600"],"mute":false,"joined_at":"2020-11-04T22:53:24.007000+00:00","hoisted_role":"665325651728793600","guild_id":"576325772629901312","deaf":false}}

[MinnDevelopment]

The documentation for GUILD_MEMBER_UPDATE says that pending is an optional field.

[advaith1]

pretty sure it should be required; that's my fault

In GUILD_ events, pending will always be included as true or false. In non GUILD_ events which can only be triggered by non-pending users, pending will not be included.

this seems to be an actual bug

[rickling]

We're looking into refactoring & improving how pending works right now per feedback from the community.

So.... this is a wontfix for now. Stay tuned.

@advaith1 is right that this is an actual bug.

[night]

Closing this as a wontfix per above.