I need to take back this statement. There seems to be a (new?) bug in LED configuration - with every restart of the router it is reset to
/etc/config/system
config led
option name 'Auto-configuration for PCI1'
option sysfs 'omnia-led:pci1'
option default '0'
option trigger 'none'
config led
option name 'Auto-configuration for PCI2'
option sysfs 'omnia-led:pci2'
option default '1'
option trigger 'netdev'
option dev 'wlan1'
option mode 'link tx rx'
config led
option name 'Auto-configuration for PCI3'
option sysfs 'omnia-led:pci3'
option default '1'
option trigger 'netdev'
option dev 'wlan0'
option mode 'link tx rx'
I think this is default configuration of TO with 2,4/5GHz-card in mPCIe-slot 2 and a 2,4GHz-card in mPCIe-slot 3, right?
I changed this configuration because of bad position for 2,4GHz-card (see other thread for this) and now have default TO 2,4/5GHz-Card running in mPCIe-slot 1 and a WLE1216V5-20 in mPCIe-slot 2 with the following configuration:
config led
option name 'Auto-configuration for PCI1'
option sysfs 'omnia-led:pci1'
option default '1'
option trigger 'phy0tpt'
config led
option name 'Auto-configuration for PCI2'
option sysfs 'omnia-led:pci2'
option default '1'
option trigger 'phy1tpt'
config led
option name 'Auto-configuration for PCI3'
option sysfs 'omnia-led:pci3'
option default '1'
option trigger 'none'
Edit: my fault, this is not bug, but intended feature (see posts below).
Disabling LED-autoconfig-script solved my issue.