app_layer.flow.failed_tcp and app_layer.flow.failed_udp values are added

[StoryPo]

In /var/log/suricata/stats.log I observe a constant increase in the value in the app_layer.flow.failed_tcp and app_layer.flow.failed_udp parameters.

app_layer.flow.failed_tcp                     | Total                     | 331
app_layer.flow.failed_udp                     | Total                     | 474

With what it can be connected? What decisions can be made? What additional information is required from me?