This message does not indicate lost packages but packages which seem retransmitted and are therefore dropped, causing the connection outages OP mentions – that is, if enough packets are being missed for the apps to "notice" something is not right. The smaller your bandwidth the more probable outages become.
Since TCP guarantees a strict order and retransmission upon lost packets, the message, by principle, can never be seen there. But! The problem introduces something called the TCP-over-TCP problem and starts occuring when making connections in the browser, in apps, etc. over TCP while connected with AirVPN over TCP.
While true, I tend to dig deeper and find out why they appear in the first place.