Stops casting after a minute

[sivan-koren]

Running in Bash:
/usr/local/bin/cast --host 10.0.6.14 url load 'http://grafana.example.com:3000/d/TndUWSRZk/main?orgId=1&refresh=5m&kiosk'
Output:

Connecting to 10.0.6.14:8009...
Connected
Failed to send load command: context deadline exceeded

Results:
Successfully casts the webpage, but then stops after a minute or two.

NOTE: The chromecast device is on a different subnet from the host. Works fine when casting from Chrome.

[sivan-koren]

UPDATE: Tested on the same subnet. Tried with both Windows 10 and CentOS 7 on several Chromecasts. Same issue.