This bug has been in the game for a very long time. It means weapons and shields on the Ebon set are completely worthless.
When I have a 1H weapon on each bar as part of the Ebon 5-pc bonus, the buff to allies is only active on one bar, not the other. It's active on myself all the time.
Please fix this. It has been reported before.
PC EU
Dweia Ceban - StamDK
Adara Ceban - MagBlade
Daewa Ceban - MagSorc
Tick-Tock Tormentor
Chimaira.eu
Friskyttarna.eu