At Bobby's suggestion I have disabled the Chromecast (Beta) app. So far, my hub seems to be running fine (sound of knocking on wood).
I am wondering, would putting the Chromecast (Beta) app on a separate hub be an effective way of avoiding the Chromecast (Beta) "issues" (hub lockups)?
I have a โmediaโ hub, which has chromecast, echo speaks & sonos speakers along with all my โspeakingโ apps.
That way, if anything goes wrong, it only affects TTS and nothing else.
I've kept all zigbee/zwave devices and associated in built apps on my main hub and made a 2nd hub have any wifi/cloud devices or custom apps/devices. Seems to be working out well and i'm many weeks without a crash/need to restore from backup.