Bluetooth lost connection Raspi3

Hey guys,

I have a problem with my Raspi. Unfortunately, the Raspi loses its Bluetooth connectivity to a Marshall ACTON speaker. After this has happened, no other outputs can be used. At first I thought about a problem with the screensaver, but this could not be confirmed after deactivating it. Strangely enough, this error does not occur when I use kodi as an airplay receiver for spotify. The link to the output of grab-logs -A:
Here is a further log with playing music over a nas.

Thank you for your help in advance.