Thanks for reaching out here in the Community!
Does the issue only occur on Netflix or across other channels installed on your Roku TV? If it's just on one channel, we suggest reaching out to Netflix Support to report the issue and get help. Channels on Roku are maintained by the channel provider themselves. In this case, there's likely an issue within that specific channel that needs to be addressed with an update from them.
You can contact them here: https://help.netflix.com/en
We appreciate your understanding.
All the best,
Roku Forum Moderator