RAK7249 in Network Server mode / whitelisting issues

Issue: device join request rejected

Setup: RAK7240 is Network Server mode. Test with 1 app & 1 device

LoRa® Server:

Details:
despite of a “join accept” message listed in thePacket logger, my device is rejected by the gateway
warning found in the system log: “white list join filter is not enable”
seems the server is using a whitelist filter but could not find such filtering option when in Network Server mode
what the use fo filtering when devices are explicitly declared in the application settings ?
stuck since one month, will appreciate your help.
anyone using RAK7249 if Network Server mode ? Successfully ?
cheers

Network Server system log:
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: rrd_statistic_up 367 uplinkTqByAirtime : dr = 1, timeonair = 741, tm = 1653768832
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: rrd_statistic_up 369 uplinkTqByPkt : dr = 1, tm = 1653768832
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: rrd_statistic_up 371 ChanBusyByAirtime chan 7, timeonair = 741, tm = 1653768832
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: INFO: [filter] white list join filter is not enable
Sat May 28 22:13:52 2022 user.info lora_pkt_fwd[2128]: INFO: [filter] The deveui:A8610A34341D6F0F join count1:1 or count2:20 out of threshold, need add to black list
Sat May 28 22:13:52 2022 user.info lora_pkt_fwd[2128]: INFO: [filter] black list update node, time_us: 1653768832877656, value: A8610A34341D6F0F
Sat May 28 22:13:52 2022 user.info lora_pkt_fwd[2128]: INFO: [filter] join list del node, value: A8610A34341D6F0F
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: Uplink Frame :
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: 00 2F 1E FE 6B 0D FA 67
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: 64 0F 6F 1D 34 34 0A 61
Sat May 28 22:13:52 2022 user.debug lora_pkt_fwd[2128]: A8 BA 4A C2 21 74 52
Sat May 28 22:13:52 2022 daemon.info gwBridge[17179]: gwBridgeReadCB: Frame size 266
Sat May 28 22:13:52 2022 daemon.info gwBridge[17179]: Enter gwBridgeFrameRcv, mdCreateEvent 0 Frame Len 266

Network Settings>Packet Forwarder>filters of

issue fixed