I’m sure that’s very frustrating! Whenever you have a problem with a custom device type handler or smartapp, you’ll get the quickest answer by asking in the author’s thread. If you Can’t remember where the author’s thread is, check the quick browse lists in the community – created wiki:
In this case, there are over 100 posts from the last week discussing what’s going on with blink in the author thread for the device type handler, so you’ll find your answers there along with what people are doing about it.