Good idea, visually appealing, interference with other devices

As written here on several occasions, is the main problem of too long connector, so my Nokia Lumia 920 floats without tinkering in the air. The plug is surrounded by a spring-loaded plate which can be pushed down, but ideally even a few mm further expected to extend upwards, it but can not. As a remedy, I have black foam rubber glued on this disk to close (about 4-5mm thick at the gap to the bottom of Lumia - so it fits.

One problem that I can not explain that on a conventional USB cable not occurred is also at the Lumia koventionellem connection the failure of my keyboard.
I run my USB keyboard and the charging cable of the Lumia via a common USB hub. Since I connected the docking station, it has happened more than once that my keyboard fails suddenly and without reason erkenbaren. Without restart this is no longer bringing in function.
Whether now the fault is on the docking station or the supplied USB cable I still could not figure out, because I have the station now connected directly to an available USB port on your PC. But now it seems to me as if the keyboard works slightly delayed and does not receive all keystrokes exactly. I take the Lumia from the station, the keyboard operates as used to.

Addendum:
The temporary failure of the keyboard will continue to exist - and that annoys enormous. I can dispense with the docking station, but not to the keyboard part will disappear from the desktop. Loading and geauscht data is again a conventional USB cable.
The Docking Station is now degraded to pure charger and attached directly to the wall socket. Therefore, another star deduction.