Is there a neutral-sounding (i.e. doesn't mention the devil) synonym for the idiom "speak of the devil"?
The idiom "are your ears burning" or a derivative of that wouldn't be great for this case because it's referring a non-person event that occurred (i.e. which doesn't have ears).
For example, talking about a computer sending an alert about a possible issue, then not getting any alerts for a while, then talking about the alerts the computer had sent in the past and right after that getting another alert.