@Solla-topee Thanks - I just loaded the new firmware.
Unfortunately I still get quite a few DUP packets:
Below is snip of pinging my default gateway from laptop. Laptop connected to TP link WPA4220 via WiFi. WPA4420 connected to mains to other TP device which is ethernet cable into back of BT home hub.
The Wi-Fi signal is strong with very low interference. I've tried other Wi-Fi channels but no difference. The laptop is 2m from Wifi device so don't think I can do anything better in terms of signal strength or reduced noise/interference. See below taken from laptop WiFi status. and the ping results.
Any ideas as it means using WiFi is just not reliable
thanks
Ken
64 bytes from 192.168.0.1: icmp_seq=146 ttl=64 time=8.075 ms
64 bytes from 192.168.0.1: icmp_seq=147 ttl=64 time=11.854 ms
64 bytes from 192.168.0.1: icmp_seq=148 ttl=64 time=6.564 ms
64 bytes from 192.168.0.1: icmp_seq=149 ttl=64 time=16.980 ms
64 bytes from 192.168.0.1: icmp_seq=150 ttl=64 time=8.039 ms
64 bytes from 192.168.0.1: icmp_seq=151 ttl=64 time=45.715 ms
64 bytes from 192.168.0.1: icmp_seq=152 ttl=64 time=20.143 ms
64 bytes from 192.168.0.1: icmp_seq=152 ttl=64 time=44.213 ms (DUP!)
64 bytes from 192.168.0.1: icmp_seq=153 ttl=64 time=10.331 ms
64 bytes from 192.168.0.1: icmp_seq=154 ttl=64 time=5.674 ms
64 bytes from 192.168.0.1: icmp_seq=154 ttl=64 time=10.971 ms (DUP!)
64 bytes from 192.168.0.1: icmp_seq=155 ttl=64 time=15.695 ms
64 bytes from 192.168.0.1: icmp_seq=156 ttl=64 time=5.437 ms
64 bytes from 192.168.0.1: icmp_seq=157 ttl=64 time=13.391 ms
64 bytes from 192.168.0.1: icmp_seq=158 ttl=64 time=14.244 ms