Thanks for posting here in the Roku Community, @JCfromJC!
We appreciate you reaching out to us about the issue you're encountering with the Sling app, which only buffers when streaming live TV. No worries; we'd be more than happy to help you with this.
You may try the troubleshooting steps below to see if that resolves the problem you're experiencing.
- Remove the channel: Highlight the channel tile on your home screen and press Star to open the Options menu. Select Remove channel and confirm.
- Restart your Roku device: Go to Settings > System > Power > System restart > Restart Now.
- Re-install the channel: After your Roku device restarts, visit the Roku Streaming Store and add the channel again.
For more troubleshooting tips, visit this support article: How to resolve a channel playback issue.
We hope this helps. Let us know if you need more assistance.
All the best,
Emman
Emmanuel-D.
Roku Community Moderator