[RPi4] DLNA access unstable after boot

Dear all,

my setup is as follows:
Raspberry Pi 4, LibreELEC 12.0.2 with Kodi (Omega) v21.2

The Raspberry Pi is connected to my network via Wifi. In my network, a Synology NAS is present providing DLNA.
The server is stored as a favorite.
What I experience is the following:
Apparently, the Pi has network connectivity during boot time, since it shows the correct time and date in Kodi after boot.
When I try to access the DLNA server directly after boot, in most of the cases, I just get a connection error
If I let the system sit a couple of minutes after boot and do not try to access DLNA, the issue does not appear.
In case the issue happens, DLNA seems „stuck“ in that non-working state.
What I do to repair this, is:
switch off / on DLNA in Kodi settings
or/and:
switch off and on wifi connection in Libreelec settings.

What can I do to better narrow down the problem?