Google Cast on LG Music Flow devices

Hello,
I’ve updated to raspbian stretch and HA 0.65 and I’ve noticed I’m unable to see some google cast devices
Namely a LG Music Flow speaker and the group made with another chromecast audio
I’ve got a lot of errors like this:
2018-03-11 15:38:47 WARNING (MainThread) [homeassistant.components.media_player] Setup of platform cast is taking over 10 seconds.
2018-03-11 15:39:18 ERROR (zeroconf-ServiceBrowser__googlecast._tcp.local.) [pychromecast.socket_client] Failed to connect. No retries.
2018-03-11 15:39:23 ERROR (Thread-5) [pychromecast.socket_client] Failed to connect. No retries.
2018-03-11 15:39:23 WARNING (MainThread) [homeassistant.components.media_player.cast] Can’t set up chromecast on 192.168.1.103: Failed to connect
2018-03-11 15:39:23 WARNING (MainThread) [homeassistant.components.media_player] Platform cast not ready yet. Retrying in 30 seconds.
2018-03-11 15:39:53 ERROR (Thread-2) [pychromecast.socket_client] Failed to connect, retrying in 5.0s
2018-03-11 15:40:03 WARNING (MainThread) [homeassistant.components.media_player] Setup of platform cast is taking over 10 seconds.

The single chromecast audio is detected correctly.
Has anyone the same problem?
the pychromecast lib is 2.0.0