IP Configuration failure - EX6120 Range Extender

Hello. I had some time and investigated the issue more in detail. Conclusion and 'Questions are copied from bottom to the beginning, for the details read the post all the way down. ========================================================================== Conclusion: It appears that the EX6120 with Firmware V1.0.0.16_1.0.11 cannot extend two WiFis (2.4 AND 5GHz) at the same time. It can extend one WiFi (2.4 OR 5GHz) and add a second subsidiary WiFi to the extended ones on the other frequency band. This looks to me like a firmware bug . Questions to Netgear: 1. Does Netgear confirm the above conclusion? 2. What is Netgears response to this issue? 3. By when does Netgear consider to fix this issue? ========================================================================== Issue: No Internet connection on extended 5GHz WiFi and on LAN-port of EX6120. Pre-Requisites: - Main Router is working with two different SSIDs on 2.4GHz (SSID:Test_2.4, Ch:11) and 5GHz (Test_5, Ch:36) using same passphrase. - Target #1: EX6120 to be connected via 2.4 and 5GHz WiFi to main router and to create its own 2.4 and 5GHz WiFis with same passphrases as main router. - Target #2: Use of 2pcs of EX6120-100PES to extend exsiting WiFi from one floor to three floors. - Firmware is up to date V1.0.0.16_1.0.11 - Tests are performed with only one EX6120, the other ones is still in the box (for goods return purposes if needed). - Setup of EX6120 is set to "Repeater", main Routers WiFi´s are properly detected, passphrases are entered. - EX6120 SSIDs are Test_2.4_EXT and Test_5_EXT. - EX6120 shows to have good connection to both Main router Wifi´s (green indicators). - EX6120 Ethernet Port is configured to use 5GHz WiFi. - EX6120 Regional setting is Europe - All other settings are unchanged and factory setting . - Laptop is Sony Vaio SVP1310, Windows 10 with Intel WiFi card a+b+g+n+ac+Bluetooth - Laptop connected to main router WiFi SSID Test_2.4: internet is available, connection okay. - Laptop connected to main router WiFi SSID Test_5: internet is available, connection okay. - Laptop connected to EX6120 SSID Test_2.4_EXT: internet is available, connection okay. - Laptop connected to EX6120 SSID Test_5_EXT: Does not receive IP-address (DHCP not working?), no internet connection. - Wireshark traces on computer connected to Main router show that absolutely no traffic passes through EX6120 , coming from Laptop. - Laptop#2 connected to Ethernet port of EX6120, configured for DHCP, does not recieve IP address, no internet connection. - Wireshark traces show a short period of traffic passthrough via EX6120 (via Ethernet port or 5GHz WiFi) when applying changed settings to EX6120. Passthrough Time frame is 8 to 16 seconds. 1. Check if WiFi Channel change on main router would improve situation Performed action: change channel from 36 to 40 Result: No change on Laptop and Laptop#2 Performed action 2: change from channel 40 to 48 Result: no change on Laptop and Laptop#2 2. Factory setting of EX6120 and exact identical configuration as before Result: no change on Laptop and Laptop#2 3. Re-Flash Firmware into EX6120 V1.0.0.16_1.0.11. Result: no change on Laptop and Laptop#2 4. Change Ethernet Port to use 2.4 instead of 5GHz WiFi 5. Result: Laptop#2 =internet is available, connection okay. Laptop=no change 6. Change passphrase of Test_5 and set EX6120 again to use same passphrase as Test_5 for Test_5_EXT. Result: Laptop#2 traffic passed for 16 seconds. 7. Set back identical passphrases for Test_2.4 and Test_5 on main router and set one new different passphrase for Test_2.4_EXT and Test_5_EXT on EX6120. Test_2.4_EXT and Test_5_EXT have now different passphrase as Test_2.4 and Test_5_EXT. Result: Laptop#2 traffic passed for 3 seconds. 8. Set two different passphrases in EX6120 for Test_2.4_EXT and Test_5_EXT Result: Laptop#2 traffic passed for 2 seconds. 9. Extend only 5GHz WiFi (Test_5, Ch:36), using same passphrase for Test_5 and Test_5_EXT and Test_2.4_EXT . Result: Laptop#2 internet is available, connection okay. Laptop internet is available, connection okay. Conclusion: It appears that the EX6120 with Firmware V1.0.0.16_1.0.11 cannot extend two WiFis (2.4 AND 5GHz) at the same time. It can extend one WiFi (2.4 OR 5GHz) and add a second subsidiary WiFi to the extended ones on the other frequency band. This looks to me like a firmware bug Questions: 1. Does Netgear confirm the above conclusion? 2. What is Netgears response to this issue? 3. By when does Netgear consider to fix this issue? Looking forward to a positive feedback Regards Andreas