D-link DIR-620 always rejects association

[cypa]

it was working somehow for almost 1 year and now again broken on my Arch linux Prestigio 133S laptop, a few weeks ago, after update, I've found 2 wlan interfaces instead of one and "no networks found" since then:

`~λ ip addr
....
10: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 54:c9:ef:d7:cf:b7 brd ff:ff:ff:ff:ff:ff
11: wlp0s21f0u7i2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 56:c9:ef:d7:cf:b7 brd ff:ff:ff:ff:ff:ff
~/builds/rtl8723buλ sudo systemctl stop wpa_supplicant@wlp0s21f0u7i2
~/builds/rtl8723buλ networkctl list
IDX LINK TYPE OPERATIONAL SETUP
1 lo loopback carrier unmanaged
7 enp0s21f0u4 ether routable configured
10 wlan0 wlan off unmanaged
11 wlp0s21f0u7i2 wlan off configuring

4 links listed.
~λ sudo wifi-menu wlp0s21f0u7i2
Scanning for networks... failed
No networks found
~λ sudo wifi-menu wlan0

Scanning for networks... failed
No networks found
~λ `

full details will be later

[cypa]

oops ... it was my fault, rfkill soft blocked was yes, also local AP D-link DIR-620 always rejects association

[cypa]

any other WiFi-router works well but D-link DIR-620 always rejects association - how is it possible?