I am using the ZAF client on a number of environments and have been trying to debug why this particular method window.client.set('comment.text', '') does not work on one of them.
It works on all others except one. Is it possible that the problem environment is running an older version of the ZAF client?

Thank you both! I was able to track down the issue and have submitted the bug request for patching to our dev team. I'll update this thread once we've gotten it all sorted on our end!
Have a wonderful day!
Eric Nelson | Manager - Developer Advocacy