Short answer is...You shouldn't have to.....
Since you didn't go into too much detail as to what is exactly happening...
If you have a reoccuring issue with these Roku devices (as with other electronic devices), sometimes things just corrupted and need a refresh. Memory, processors, chipsets, software, etc.
Best advice is to do a factory reset of the device. (Settings...System...Advanced System...Factory Reset)
This will restore device to original boxed condition.
Just make sure you have a working Roku or compatible Remote control before doing a Factory Reset in case anything goes wrong.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660x, Premiere+ 3921, Express 4k+ 3941