I find the callouts very helpful but also that the height callouts seem to work only once.
That is, if I descend below say 500 feet, the callout is there but if I climb again, the next time I descend below 500 feet, I do so in silence.
This applies to all the height callouts, so the first visit to an airport is excellent but any thereafter, there are no more height callouts.
Is this how it is, or is there a fix?

Many thanks,
Nick.