Push alert API sending actual_out as NULL value

Using aeroAPI, I have registered an alert and when callback was invoked payload has "actual_out": null, . This seems very odd behaviour , the reason we have registered was to get actual departure time.

Question : is it common to send actual_out as NULL or is there bug ?

Details and alert id below:

Gate times (actual_out/actual_in) are not always available for all airlines or flights, depending on data partnerships and coverage limitations. Note that the runway departure time (actual_off) is what most directly corresponds to the departure alert, and that is non-null.

Using aeroAPI, I have registered an alert and when callback was invoked payload has "actual_out": null, . This seems very odd behaviour , the reason we have registered was to get actual departure time.

Question : is it common to send actual_out as NULL or is there bug ?

Details and alert id below:

Thanks For the help.