I also have an Ultra and the beeping won't stop and there is no disable option under the lost remote sound settings, there's only the three beep sounds to choose from. Sounds like this is feature, not a bug, to have you buy another Roku product sooner. 😞
Hi @QokuSokuNotRku,
Greetings from the Roku Community!
We will be more than happy to assist you further. Please note that the Roku remote finder feature will only be enabled once you press the locator button, and pressing any button will stop the sound. For more information about the Roku remote finder, visit our Support page here: How do I find my Roku remote using a remote finder?
We hope this helps, and please keep us posted if you need anything else.
Best regards, John