Chromecast devices rebooting when playing movie via plex

Hi,
I’ve got two chromecast 4K devices at home that I cast moveis to from Plex on iOS and Android. On both devices I’ve noticed the following
1). Periodically when playing a film, we get the message that the chromecast device is ready for ple to cast something to it. We then have to start the film again and move to the plae it stopped at manually

2). Periodically, the chromecast device reboots.

The above happens on both chromecast devices. I’m running PMS 1.8.1 and have latest plex apps on iOS and Android.

\afaik the chromecast devices are runnig the latest UK verson of firmware

Rgds
Alex

And as an update

1). Upgraded chromecast devices to latest firmware

2). No longer reboots but …

Still does …

“Periodically when playing a film, we get the message that the chromecast device is ready for ple to cast something to it. We then have to start the film again and move to the place it stopped at manually”
with combination of iOS _ CCast / Android + CCast

Moving back to using my ROKU 3 and everything is rock solid