just uploaded a new version DSM 6.1
Goedenavond Kacper, what UPnP media server software are you using ??? Synology Media Server or Minimserver??
If Media Server have you installed the latest rev. Version: 1.7.0-2810 (released yesterday) Did it install OK or like me, disappear until rebooted.
If Minimserver how is it?? Synology made a point during beta testing of making it clear its up to Minimserver to ensure no problems & they cannot ensure all will be OK when DSM 6.1-15047 is released (today)