Welcome to the Roku Community, @Thevec!
Thank you for letting us know about the issue you've encountered with the up arrow button of your Roku remote. We'd be happy to help you find the best resolution possible.
May we first know if this is the only button you are having issues with? Also, is this the remote that came with your Roku streaming stick? When and where did you purchase this?
We'll be looking forward to your update.
Best regards,
Carly
Carly Y.
Roku Community Moderator