Thanks for reaching out to the Roku Community. We'd like to investigate and try to help.
A few questions here to better understand what you're experiencing: Does the issue only occur on a Netflix channel or all channels on your Roku device?
Can you please provide us with the following information:
-Roku device model, serial number, device ID, and software OS/version (these can all be found in Settings > System > About)
-does this issue occur on a specific channel? if so, what channel and what version/build is the channel (this can be found by selecting the channel on the Home screen and pressing the * button)
-tracker ID when this issue occurs (when you see this issue occur, press the Home button 5 times, followed by the Back button 5 times)
-steps to reproduce the issue you are seeing
-the image of the issue you are experiencing
With more information, we will be able to assist you further.