I'd say clean the bobbin area and give it a try. I have used canned air since a teacher at my dealer showed how to use it by first removing the throat plate and holding the can behind the machine. That way the air blows out the front. I do also have a small vacuum cleaner that I used between projects. Usually, though, just cleaning with the tiny brush between bobbin fill-ups works find. Of course, I don't have a warning signal, so I can really address your problem.
Wishing you good luck solving the problem!