How long did it take to acquire the signal at home?
How long was it since you had used the GPS?
Was your home the last position you used the GPS prior to this use?
In my experience the problem manifests itself when the GPS is started at a different location to the last time it was used and/or there has been a considerable time between it’s use. In my opinion switching it back on as soon as you did and in the same location is not a true test to see how quickly the GPS acquires a signal.