Should add this as an edit but I want it to stick out:
A quick and hopefully temporary fix for this is making 2 macros:
A. /clearfocus
B. /focus <Name of Desired Focus / Tricks target>
Click Macro A then Macro B real fast and the CC will resume rotation.
It seems that the problem occurs whenever the focus leaves range and it throws an error into a line somewhere. On Ultraxion whenever i Use Heroic Will to escape the Twilight, We each enter a different phase, meaning my focus is unreachable after each of Ultraxion's hour of twilight casts. Using this set of macros allows smooth recovery of the error and dps to continue.
Hopefully this info helps with fixing whatever the problem is.