Connection problems to a Airport Extreme HDD

i’m using a RPi 2 with latest OSMC build.
I store my media on an Airport Extreme HDD and use samba to connect my RPi 2 and with Airport.
Until the last Update of OSMC everything worked properly, but now there is an issue with Samba-client.

Directly after booting the RPi everything work for some time, but after some time and accessing some files on mit AirPort the connection break up and you can’t access any files on the Airport (even if you try to reset the connection and configure it completely new) because of connection problems. But after restart of the Rpi it works for some time.
Because of this problem i can’t scan my media and its impossible to add new Music.

Is there anybody who has the same problems?

Sorry for my bad english
Cheers Steffen