Unable to edit PartialMessage's embed on 2.0.0b5

[argo0n]

Summary

I am unable to edit a PartialMessage's embed on Pycord's 2.0.0b5 version, although editing the content works.

Reproduction Steps

1. Send a message
2. Get the partial message through get_partial_message(message id)
3. edit the partial message with .edit(embed=embed)

Minimal Reproducible Code

import asyncio
embed = discord.Embed(title="Alpha")
msg = await ctx.send("Alpha", embed=embed)
await asyncio.sleep(1.0)
partialmsg = ctx.channel.get_partial_message(msg.id)
embed.title = "Bravo"
await partialmsg.edit(content = "Bravo", embed=embed)

Expected Results

When editing the message, both the content and the embed gets edited.

Actual Results

Only the content got edited. If you only pass embed and not content, the same thing happens.

Intents

discord.Intents(guilds = True, members = True, presences = True, messages = True, reactions = True, emojis = True, invites = True, voice_states = True, message_content = True)

System Information

• Python v3.8.10-final
• py-cord v2.0.0-beta
  • py-cord pkg_resources: v2.0.0b5
• aiohttp v3.7.4.post0
• system info: Windows 10 10.0.22000

Checklist

• I have searched the open issues for duplicates.
• I have shown the entire traceback, if possible.
• I have removed my token from display, if visible.

Additional Context

Editing the partial message still works on 2.0.0b4 and lower.

Here's a video: https://cdn.discordapp.com/attachments/871737314831908974/954658593217585172/2022-03-19_16-30-36.mp4

[Tiffinini]

Ran into this same issue today which is what led me here. No attempts to push embed changes via the .edit method of a partial message appear to work in b5.

[argo0n]

Just found out setting discord.http.API_VERSION = 9 is a workaround for this problem, so I'm assuming it's a problem with the HTTP state/API?

[argo0n]

Thank you so much for fixing it!