Some songs will chromecast, but some songs don't?

Hi,

I have some inconsistent issue on chromecasting.
All the devices in the example below are signed in as same account,
which means both devices A and B has the same full access to the library.

Song A will chromecast from Device A to Device B, and also from Device B to Device A.
Song B will chromecast from Device A to Device B but wouldn’t from Device B to A. I see no progress of the playback.

Any fixes for this?

What devices you are talking about? What type of audio files are they?

It also seems like you are talking about controlling one Plex app with another and not an actual Chromecast device but not sure.

Thanks for your reply.

Let me focus on Android device for now.
Song A will chromecast from my android phone with a plex app to
a Android TV device with a plex app.
But for song B, it wouldn’t cast from my android phone to android TV.

In case when casting doesn’t work, it opens up plex on android TV,
even plex is already launched, and just stays there.

Not sure of how I fixed it, but rebooting the router made it much consistent and stable.

ok thanks for letting me know. I was not able to repro it.