Hi Subin, 

On Wed, 2 Jan 2019 at 18:47, Subin Abid <subinabid@gmail.com> wrote:
Hello,

Android device (using Home app) cannot connect to chromecast while the device is connected to VPN. Is anyone else facing this problem?

The network settings for the peer has a checkbox 'Exclude Private IPs'; 
You need it enabled so that your phone and Chromecast can talk to 
each other on the private network rather than going through the VPN tunnel. 

Previous related thread for more info: 
https://lists.zx2c4.com/pipermail/wireguard/2018-July/003107.html
 
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Regards,

Jaseem Abid
https://twitter.com/jaseemabid