Here is my talent setup. C4PAmlAud78JeBus2NHhXmG2kBAAAAAAAAAAAAMzMMzYMmZGzMzMzMMzYYmBAAAAAAAmhxMmZmxMamxYMzMMLDzYGsB
My rapid fires are cancelling about halfway into the channel.
I push the button once and that is it for testing, to ensure I don’t double click the cast.
Sometimes it will fully channel and others it cancels itself.
I pulled the spell out of my spellbook for this test, to ensure it isn’t a macro issue.
The first cast of the rotation seems fine, but with trueshot activated and after using 2 aimed shots, it cancels the channel almost as soon as it starts.