Hi there eandmcox,
Does this only happen when you use your Personal Hotspot to stream services on your LG TV or does it happen with multiple internet networks? Knowing if this happens with multiple internet networks or only your Personal Hotspot can help determine possible next steps.
One step you can take is to ensure that your carrier settings for your iPhone 11 are fully up-to-date, as it might help with cellular performance and this issue you're encountering. Below shows how to manually check for an update:
- "Make sure that your device is connected to Wi-Fi or a cellular network.
- Tap Settings > General > About.
- Follow the onscreen instructions to install your carrier update."
Those steps are from the article: Manually update your carrier settings on your iPhone or iPad Another step you can also take is to restart your iPhone 11. Restarting can refresh the iOS and sometimes help unexpected issues. If needed, this article shows how: Restart your iPhone
Take care.