While I was doing TOS while playing witch, I was going to control someone into the the jailor. Then I figured out the person was vet so I canceled in a few seconds for the next day. I thought I was free but then I was killed by vet. I thought I did it to slow but it said in chat that I canceled it. So either I was too slow or there is a bug.
Latency can be an issue, causing last second changes to possibly not go through. The message to have changed one's mind is client sided, thus it does not tell that your change reached the server in time.
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