nbRep or nbTrans increased to 3 for no apparent reason


My node receives a LinkADRReq from network server and the NS is requesting to transmit 3 repetitions. The SNR seems unchanged, RSSI is also not changing, packets are not lost but NS perform this request. What could be the reason?

NS version: 2.8.2
AS version: 2.6.1
LoRa version 1.0.3


Without the a log of the previously received packets by LoRa Server, this is hard to say but usually this indicates that there has been packetloss.