With most of the heroes I've played you are able to cancel channels and other types of sustained abilities by simply repressing the cast key, OR using the cancel cast button to stop everything.
With Kelvin, it seems this doesn't work for Ice Path or Arctic Beam. The only way to cancel is to stop everything at once, I'm unable to stop the path to drop down more easily while continuing to channel beam, and I'm unable to stop channeling beam in order to keep running on the path for escape etc.
There's actually another inconsistency with this kit as well, which is that Kelvin can begin casting Ice Path or Arctic Beam at any time (including while the other is being cast), and he can cast Frozen Shelter while already casting Ice Path, but he cannot begin Frozen Shelter while channeling Arctic Beam.
With Kelvin, it seems this doesn't work for Ice Path or Arctic Beam. The only way to cancel is to stop everything at once, I'm unable to stop the path to drop down more easily while continuing to channel beam, and I'm unable to stop channeling beam in order to keep running on the path for escape etc.
There's actually another inconsistency with this kit as well, which is that Kelvin can begin casting Ice Path or Arctic Beam at any time (including while the other is being cast), and he can cast Frozen Shelter while already casting Ice Path, but he cannot begin Frozen Shelter while channeling Arctic Beam.