Slack / Zoho Flow; Repl

Slack / Zoho Flow; Repl

I am trying to add a comment in a zoho ticket when someone reply's to a message in a thread. 

The  Message posted to public channel trigger doesn't seem to pick up thread messages. I also cannot use the thread_ts field as it doesn't seem to pull that in. Is there any workaround to detect messages in thread replies and have access to the thread_ts variable?