Manual targetting breaks after four players

[RileyNiko]

Checklist

• [X] I've checked both open and recently closed issues to ensure this issue is not already reported.
• [X] I am using the newest version of TETR.IO.
• [X] I am using a supported browser or the Desktop Client.
• [X] I am not using anything that modifies game code (e.g. TETR.IO PLUS).
• [X] I am certain this is a bug, not a feature request.

OS and Version

Arch Linux 6.9.7-zen1-1-zen

Browser and version

Desktop Client

Describe the bug/issue

With four players manual targetting works perfectly fine, but once our fifth connects, people randomly lose the ability to target me. One other player was able to hold a lock on me, but for others they couldn't do anything.

Reproducing

1. Go to a custom game with 5+ players
2. Enable manual targeting
3. Try to click on someone

Expected behavior

Presumably, all four of them should be able to target me simultaneously.

Screenshots

No response

Console logs

No response

Additional context

No response

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