Is this for Classic or Retail?
If this is in Retail, it almost sounds like you have a multi-step keybind, where step 1 is doing IWT and step two is doing something to interfere unless you wait long enough for it to reset.
The IWT/CTM used in Classic seems different. I don't multibox right now to test but solo the CTM part seems odd and this fix may not work for Classic.
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