Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Flight Crew Last 90 Days 154; Flight Crew Type 3000
Communication Breakdown
Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
General None Reported / Taken
Environment - Non Weather Related; Company Policy; Human Factors
The A Flight Attendant immediately contacted us through the service interphone after hearing the single ring indicating our climb through 10;000 feet.  He stated that he was not seated during takeoff; his galley was not secure; and that coffee had spilled on himself and his iPad. He then went on to state that the reason he was not able to complete his tasks prior to pushback and departure was because he was having to deal with passengers and their improper usage of masks. The B; C; and D Flight Attendants did not mention any passenger issues to us.As the First Officer; take a more proactive role in ensuring the flight attendants acknowledge the single ring prior to takeoff.  Also; it is my understanding that the flight attendants are supposed to immediately inform the pilots of any disruption or disturbance in the cabin in which they are unable to perform or complete their required tasks.
After giving the chime and monitoring the bell across the PA I called for the Before Takeoff Checklist.  After completing the checklist we switched the radio to Tower and they cleared us for takeoff with an aircraft on a 3 NM final.  With this distraction; I failed to listen to the A FA make his Departure PA.  Around 10;000 feet the A FA called to say he had been in the aisle during takeoff.  He told the FO he had been talking to a couple of passengers about wearing their masks and hadn't received the attendant chime.  He told the FO he had not fully secured the galley and had coffee spilled on his EFB and personal device.  He said he had no physical injury or harm and that overall he was fine.  I clearly heard the chime; but failed to monitor his PA.A FA should not be monitoring masks before takeoff at that time because non compliant passengers are less of a safety risk than delaying preparation for takeoff.  I will be more cognizant of listening to the FA PA per the AOM in the future.
Air carrier flight crew reported a Flight Attendant was not seated for departure due to having to deal with passengers not properly wearing face masks.