If you not watching any TV on a ROKU or your being idle in whatever app your on. Then, your ROKU starts freeze and then it reboots/restarts when it's froze more like crashing. And, I have experienced that a lot of times and I don't know how to fix it. Is there like any way to resolve this issue?
You need to be more specific. What model Roku are you using? If it is a Stick, it is connected directly to the TV or do you have an HDMI extension cable? Is the Roku being powered by a USB port on the TV, or are you using the power cube it came with? There are many variables that can offer some clues to the problem.