slime AI takeover after splitting

[MonkestationIssueBot]

Reporting client info: Client Information:
BYOND:515.1637
Key:alphabravozero

Round ID:

5471

Testmerges:

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• The main CWC PR

Reproduction:

I was playing as a red slime that spawned from a pyroclastic anomaly, and split up after feeding enough. After splitting, the slime AI took over while I was still playing as that slime. I could still try to control it but that would cause the slime to respond to both the AI and my input.

[Kmla2]

duplicate of #2179 , #2053, #1699, #1734 and #1680