Thanks for posting in the Roku Community!
We'd like to gather more information about the issue you're running into. A few questions here to better understand what you're experiencing:
1. Does the issue only occur on a specific channel or all channels on your Roku device?
2. How long has the issue been occurring?
3. What specific troubleshooting steps have you taken so far to try to resolve the issue?
To help troubleshoot the issue further, follow this link: Turning closed captions on or off
With more information, we will be able to assist you further.