InMyVoice v1.2.4 not working in PTB - same symptoms as #177 and #179

[mjeveritt]

Plugin:

🔊 InMyVoice

What version of BetterDiscord are you using?

1.13.14

What version of the selected plugin(s) are you using (if applicable)?

1.2.4

What client are you using?

🔷 PTB

Describe the bug

See #177 (comment)

Additional comments

No response

I have read and agree to the following:

• I have searched existing/closed issues to confirm that this hasn't been solved already.
• I've already tried to disable all other plugins (or themes) to confirm this issue is related to the plugin.
  This isn't necessarily required