trackTrace no longer working since this week

[ypan0]

we are using the package on azure function, the package version is 2.7.0
it started not logging any trace log this week, we have tried upgrading to v2.9.5 and v3.0.1, none of them worked
the way we use it is

const appInsights = require('applicationinsights');

appInsights.setup().start();

client.trackTrace({
        message,
        properties: customProperties,
        severityLevel
    });

any advice? or any thought why it stopped working this week?

[Jackson Weber]

@ypan0 There's no reason that trackTrace shouldn't work specifically. I'd make sure that the Azure Function isn't exiting before telemetry can be exported first.